All qdev definitions are available from other headers, user-mode emulation does not need hw/hw.h. By considering system emulation only, it is simpler to disentangle hw/hw.h from NEED_CPU_H. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1202 lines
31 KiB
C
1202 lines
31 KiB
C
/*
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* S/390 memory access helper routines
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*
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* Copyright (c) 2009 Ulrich Hecht
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* Copyright (c) 2009 Alexander Graf
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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#include "exec/cpu_ldst.h"
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#if !defined(CONFIG_USER_ONLY)
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#include "hw/s390x/storage-keys.h"
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#endif
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/*****************************************************************************/
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/* Softmmu support */
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#if !defined(CONFIG_USER_ONLY)
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/* try to fill the TLB and return an exception if error. If retaddr is
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NULL, it means that the function was called in C code (i.e. not
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from generated code or from helper.c) */
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/* XXX: fix it to restore all registers */
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void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
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uintptr_t retaddr)
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{
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int ret;
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ret = s390_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
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if (unlikely(ret != 0)) {
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if (likely(retaddr)) {
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/* now we have a real cpu fault */
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cpu_restore_state(cs, retaddr);
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}
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cpu_loop_exit(cs);
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}
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}
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#endif
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/* #define DEBUG_HELPER */
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#ifdef DEBUG_HELPER
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#define HELPER_LOG(x...) qemu_log(x)
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#else
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#define HELPER_LOG(x...)
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#endif
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/* Reduce the length so that addr + len doesn't cross a page boundary. */
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static inline uint64_t adj_len_to_page(uint64_t len, uint64_t addr)
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{
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#ifndef CONFIG_USER_ONLY
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if ((addr & ~TARGET_PAGE_MASK) + len - 1 >= TARGET_PAGE_SIZE) {
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return -addr & ~TARGET_PAGE_MASK;
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}
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#endif
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return len;
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}
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static void fast_memset(CPUS390XState *env, uint64_t dest, uint8_t byte,
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uint32_t l)
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{
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int mmu_idx = cpu_mmu_index(env, false);
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while (l > 0) {
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void *p = tlb_vaddr_to_host(env, dest, MMU_DATA_STORE, mmu_idx);
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if (p) {
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/* Access to the whole page in write mode granted. */
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int l_adj = adj_len_to_page(l, dest);
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memset(p, byte, l_adj);
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dest += l_adj;
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l -= l_adj;
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} else {
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/* We failed to get access to the whole page. The next write
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access will likely fill the QEMU TLB for the next iteration. */
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cpu_stb_data(env, dest, byte);
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dest++;
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l--;
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}
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}
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}
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static void fast_memmove(CPUS390XState *env, uint64_t dest, uint64_t src,
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uint32_t l)
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{
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int mmu_idx = cpu_mmu_index(env, false);
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while (l > 0) {
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void *src_p = tlb_vaddr_to_host(env, src, MMU_DATA_LOAD, mmu_idx);
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void *dest_p = tlb_vaddr_to_host(env, dest, MMU_DATA_STORE, mmu_idx);
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if (src_p && dest_p) {
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/* Access to both whole pages granted. */
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int l_adj = adj_len_to_page(l, src);
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l_adj = adj_len_to_page(l_adj, dest);
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memmove(dest_p, src_p, l_adj);
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src += l_adj;
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dest += l_adj;
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l -= l_adj;
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} else {
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/* We failed to get access to one or both whole pages. The next
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read or write access will likely fill the QEMU TLB for the
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next iteration. */
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cpu_stb_data(env, dest, cpu_ldub_data(env, src));
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src++;
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dest++;
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l--;
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}
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}
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}
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/* and on array */
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uint32_t HELPER(nc)(CPUS390XState *env, uint32_t l, uint64_t dest,
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uint64_t src)
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{
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int i;
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unsigned char x;
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n",
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__func__, l, dest, src);
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for (i = 0; i <= l; i++) {
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x = cpu_ldub_data(env, dest + i) & cpu_ldub_data(env, src + i);
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if (x) {
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cc = 1;
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}
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cpu_stb_data(env, dest + i, x);
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}
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return cc;
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}
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/* xor on array */
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uint32_t HELPER(xc)(CPUS390XState *env, uint32_t l, uint64_t dest,
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uint64_t src)
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{
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int i;
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unsigned char x;
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n",
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__func__, l, dest, src);
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/* xor with itself is the same as memset(0) */
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if (src == dest) {
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fast_memset(env, dest, 0, l + 1);
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return 0;
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}
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for (i = 0; i <= l; i++) {
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x = cpu_ldub_data(env, dest + i) ^ cpu_ldub_data(env, src + i);
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if (x) {
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cc = 1;
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}
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cpu_stb_data(env, dest + i, x);
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}
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return cc;
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}
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/* or on array */
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uint32_t HELPER(oc)(CPUS390XState *env, uint32_t l, uint64_t dest,
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uint64_t src)
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{
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int i;
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unsigned char x;
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n",
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__func__, l, dest, src);
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for (i = 0; i <= l; i++) {
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x = cpu_ldub_data(env, dest + i) | cpu_ldub_data(env, src + i);
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if (x) {
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cc = 1;
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}
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cpu_stb_data(env, dest + i, x);
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}
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return cc;
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}
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/* memmove */
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void HELPER(mvc)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src)
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{
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int i = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n",
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__func__, l, dest, src);
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/* mvc with source pointing to the byte after the destination is the
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same as memset with the first source byte */
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if (dest == (src + 1)) {
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fast_memset(env, dest, cpu_ldub_data(env, src), l + 1);
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return;
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}
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/* mvc and memmove do not behave the same when areas overlap! */
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if ((dest < src) || (src + l < dest)) {
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fast_memmove(env, dest, src, l + 1);
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return;
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}
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/* slow version with byte accesses which always work */
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for (i = 0; i <= l; i++) {
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cpu_stb_data(env, dest + i, cpu_ldub_data(env, src + i));
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}
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}
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/* compare unsigned byte arrays */
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uint32_t HELPER(clc)(CPUS390XState *env, uint32_t l, uint64_t s1, uint64_t s2)
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{
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int i;
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unsigned char x, y;
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uint32_t cc;
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HELPER_LOG("%s l %d s1 %" PRIx64 " s2 %" PRIx64 "\n",
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__func__, l, s1, s2);
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for (i = 0; i <= l; i++) {
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x = cpu_ldub_data(env, s1 + i);
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y = cpu_ldub_data(env, s2 + i);
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HELPER_LOG("%02x (%c)/%02x (%c) ", x, x, y, y);
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if (x < y) {
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cc = 1;
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goto done;
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} else if (x > y) {
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cc = 2;
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goto done;
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}
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}
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cc = 0;
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done:
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HELPER_LOG("\n");
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return cc;
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}
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/* compare logical under mask */
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uint32_t HELPER(clm)(CPUS390XState *env, uint32_t r1, uint32_t mask,
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uint64_t addr)
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{
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uint8_t r, d;
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uint32_t cc;
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HELPER_LOG("%s: r1 0x%x mask 0x%x addr 0x%" PRIx64 "\n", __func__, r1,
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mask, addr);
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cc = 0;
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while (mask) {
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if (mask & 8) {
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d = cpu_ldub_data(env, addr);
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r = (r1 & 0xff000000UL) >> 24;
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HELPER_LOG("mask 0x%x %02x/%02x (0x%" PRIx64 ") ", mask, r, d,
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addr);
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if (r < d) {
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cc = 1;
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break;
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} else if (r > d) {
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cc = 2;
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break;
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}
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addr++;
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}
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mask = (mask << 1) & 0xf;
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r1 <<= 8;
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}
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HELPER_LOG("\n");
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return cc;
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}
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static inline uint64_t fix_address(CPUS390XState *env, uint64_t a)
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{
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/* 31-Bit mode */
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if (!(env->psw.mask & PSW_MASK_64)) {
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a &= 0x7fffffff;
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}
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return a;
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}
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static inline uint64_t get_address(CPUS390XState *env, int x2, int b2, int d2)
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{
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uint64_t r = d2;
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if (x2) {
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r += env->regs[x2];
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}
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if (b2) {
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r += env->regs[b2];
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}
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return fix_address(env, r);
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}
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static inline uint64_t get_address_31fix(CPUS390XState *env, int reg)
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{
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return fix_address(env, env->regs[reg]);
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}
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/* search string (c is byte to search, r2 is string, r1 end of string) */
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uint64_t HELPER(srst)(CPUS390XState *env, uint64_t r0, uint64_t end,
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uint64_t str)
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{
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uint32_t len;
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uint8_t v, c = r0;
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str = fix_address(env, str);
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end = fix_address(env, end);
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/* Assume for now that R2 is unmodified. */
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env->retxl = str;
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/* Lest we fail to service interrupts in a timely manner, limit the
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amount of work we're willing to do. For now, let's cap at 8k. */
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for (len = 0; len < 0x2000; ++len) {
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if (str + len == end) {
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/* Character not found. R1 & R2 are unmodified. */
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env->cc_op = 2;
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return end;
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}
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v = cpu_ldub_data(env, str + len);
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if (v == c) {
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/* Character found. Set R1 to the location; R2 is unmodified. */
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env->cc_op = 1;
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return str + len;
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}
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}
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/* CPU-determined bytes processed. Advance R2 to next byte to process. */
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env->retxl = str + len;
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env->cc_op = 3;
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return end;
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}
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/* unsigned string compare (c is string terminator) */
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uint64_t HELPER(clst)(CPUS390XState *env, uint64_t c, uint64_t s1, uint64_t s2)
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{
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uint32_t len;
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c = c & 0xff;
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s1 = fix_address(env, s1);
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s2 = fix_address(env, s2);
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/* Lest we fail to service interrupts in a timely manner, limit the
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amount of work we're willing to do. For now, let's cap at 8k. */
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for (len = 0; len < 0x2000; ++len) {
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uint8_t v1 = cpu_ldub_data(env, s1 + len);
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uint8_t v2 = cpu_ldub_data(env, s2 + len);
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if (v1 == v2) {
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if (v1 == c) {
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/* Equal. CC=0, and don't advance the registers. */
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env->cc_op = 0;
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env->retxl = s2;
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return s1;
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}
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} else {
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/* Unequal. CC={1,2}, and advance the registers. Note that
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the terminator need not be zero, but the string that contains
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the terminator is by definition "low". */
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env->cc_op = (v1 == c ? 1 : v2 == c ? 2 : v1 < v2 ? 1 : 2);
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env->retxl = s2 + len;
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return s1 + len;
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}
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}
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|
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/* CPU-determined bytes equal; advance the registers. */
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env->cc_op = 3;
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env->retxl = s2 + len;
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return s1 + len;
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}
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|
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/* move page */
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void HELPER(mvpg)(CPUS390XState *env, uint64_t r0, uint64_t r1, uint64_t r2)
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{
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/* XXX missing r0 handling */
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env->cc_op = 0;
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fast_memmove(env, r1, r2, TARGET_PAGE_SIZE);
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}
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/* string copy (c is string terminator) */
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uint64_t HELPER(mvst)(CPUS390XState *env, uint64_t c, uint64_t d, uint64_t s)
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{
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uint32_t len;
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c = c & 0xff;
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d = fix_address(env, d);
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s = fix_address(env, s);
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/* Lest we fail to service interrupts in a timely manner, limit the
|
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amount of work we're willing to do. For now, let's cap at 8k. */
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for (len = 0; len < 0x2000; ++len) {
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uint8_t v = cpu_ldub_data(env, s + len);
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cpu_stb_data(env, d + len, v);
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if (v == c) {
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/* Complete. Set CC=1 and advance R1. */
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env->cc_op = 1;
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env->retxl = s;
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return d + len;
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}
|
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}
|
|
|
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/* Incomplete. Set CC=3 and signal to advance R1 and R2. */
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env->cc_op = 3;
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env->retxl = s + len;
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return d + len;
|
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}
|
|
|
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static uint32_t helper_icm(CPUS390XState *env, uint32_t r1, uint64_t address,
|
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uint32_t mask)
|
|
{
|
|
int pos = 24; /* top of the lower half of r1 */
|
|
uint64_t rmask = 0xff000000ULL;
|
|
uint8_t val = 0;
|
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int ccd = 0;
|
|
uint32_t cc = 0;
|
|
|
|
while (mask) {
|
|
if (mask & 8) {
|
|
env->regs[r1] &= ~rmask;
|
|
val = cpu_ldub_data(env, address);
|
|
if ((val & 0x80) && !ccd) {
|
|
cc = 1;
|
|
}
|
|
ccd = 1;
|
|
if (val && cc == 0) {
|
|
cc = 2;
|
|
}
|
|
env->regs[r1] |= (uint64_t)val << pos;
|
|
address++;
|
|
}
|
|
mask = (mask << 1) & 0xf;
|
|
pos -= 8;
|
|
rmask >>= 8;
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
/* execute instruction
|
|
this instruction executes an insn modified with the contents of r1
|
|
it does not change the executed instruction in memory
|
|
it does not change the program counter
|
|
in other words: tricky...
|
|
currently implemented by interpreting the cases it is most commonly used in
|
|
*/
|
|
uint32_t HELPER(ex)(CPUS390XState *env, uint32_t cc, uint64_t v1,
|
|
uint64_t addr, uint64_t ret)
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
uint16_t insn = cpu_lduw_code(env, addr);
|
|
|
|
HELPER_LOG("%s: v1 0x%lx addr 0x%lx insn 0x%x\n", __func__, v1, addr,
|
|
insn);
|
|
if ((insn & 0xf0ff) == 0xd000) {
|
|
uint32_t l, insn2, b1, b2, d1, d2;
|
|
|
|
l = v1 & 0xff;
|
|
insn2 = cpu_ldl_code(env, addr + 2);
|
|
b1 = (insn2 >> 28) & 0xf;
|
|
b2 = (insn2 >> 12) & 0xf;
|
|
d1 = (insn2 >> 16) & 0xfff;
|
|
d2 = insn2 & 0xfff;
|
|
switch (insn & 0xf00) {
|
|
case 0x200:
|
|
helper_mvc(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0x400:
|
|
cc = helper_nc(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0x500:
|
|
cc = helper_clc(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0x600:
|
|
cc = helper_oc(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0x700:
|
|
cc = helper_xc(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0xc00:
|
|
helper_tr(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
case 0xd00:
|
|
cc = helper_trt(env, l, get_address(env, 0, b1, d1),
|
|
get_address(env, 0, b2, d2));
|
|
break;
|
|
default:
|
|
goto abort;
|
|
}
|
|
} else if ((insn & 0xff00) == 0x0a00) {
|
|
/* supervisor call */
|
|
HELPER_LOG("%s: svc %ld via execute\n", __func__, (insn | v1) & 0xff);
|
|
env->psw.addr = ret - 4;
|
|
env->int_svc_code = (insn | v1) & 0xff;
|
|
env->int_svc_ilen = 4;
|
|
helper_exception(env, EXCP_SVC);
|
|
} else if ((insn & 0xff00) == 0xbf00) {
|
|
uint32_t insn2, r1, r3, b2, d2;
|
|
|
|
insn2 = cpu_ldl_code(env, addr + 2);
|
|
r1 = (insn2 >> 20) & 0xf;
|
|
r3 = (insn2 >> 16) & 0xf;
|
|
b2 = (insn2 >> 12) & 0xf;
|
|
d2 = insn2 & 0xfff;
|
|
cc = helper_icm(env, r1, get_address(env, 0, b2, d2), r3);
|
|
} else {
|
|
abort:
|
|
cpu_abort(CPU(cpu), "EXECUTE on instruction prefix 0x%x not implemented\n",
|
|
insn);
|
|
}
|
|
return cc;
|
|
}
|
|
|
|
/* load access registers r1 to r3 from memory at a2 */
|
|
void HELPER(lam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
int i;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
env->aregs[i] = cpu_ldl_data(env, a2);
|
|
a2 += 4;
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* store access registers r1 to r3 in memory at a2 */
|
|
void HELPER(stam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
int i;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
cpu_stl_data(env, a2, env->aregs[i]);
|
|
a2 += 4;
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* move long */
|
|
uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2)
|
|
{
|
|
uint64_t destlen = env->regs[r1 + 1] & 0xffffff;
|
|
uint64_t dest = get_address_31fix(env, r1);
|
|
uint64_t srclen = env->regs[r2 + 1] & 0xffffff;
|
|
uint64_t src = get_address_31fix(env, r2);
|
|
uint8_t pad = env->regs[r2 + 1] >> 24;
|
|
uint8_t v;
|
|
uint32_t cc;
|
|
|
|
if (destlen == srclen) {
|
|
cc = 0;
|
|
} else if (destlen < srclen) {
|
|
cc = 1;
|
|
} else {
|
|
cc = 2;
|
|
}
|
|
|
|
if (srclen > destlen) {
|
|
srclen = destlen;
|
|
}
|
|
|
|
for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
|
|
v = cpu_ldub_data(env, src);
|
|
cpu_stb_data(env, dest, v);
|
|
}
|
|
|
|
for (; destlen; dest++, destlen--) {
|
|
cpu_stb_data(env, dest, pad);
|
|
}
|
|
|
|
env->regs[r1 + 1] = destlen;
|
|
/* can't use srclen here, we trunc'ed it */
|
|
env->regs[r2 + 1] -= src - env->regs[r2];
|
|
env->regs[r1] = dest;
|
|
env->regs[r2] = src;
|
|
|
|
return cc;
|
|
}
|
|
|
|
/* move long extended another memcopy insn with more bells and whistles */
|
|
uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
|
|
uint32_t r3)
|
|
{
|
|
uint64_t destlen = env->regs[r1 + 1];
|
|
uint64_t dest = env->regs[r1];
|
|
uint64_t srclen = env->regs[r3 + 1];
|
|
uint64_t src = env->regs[r3];
|
|
uint8_t pad = a2 & 0xff;
|
|
uint8_t v;
|
|
uint32_t cc;
|
|
|
|
if (!(env->psw.mask & PSW_MASK_64)) {
|
|
destlen = (uint32_t)destlen;
|
|
srclen = (uint32_t)srclen;
|
|
dest &= 0x7fffffff;
|
|
src &= 0x7fffffff;
|
|
}
|
|
|
|
if (destlen == srclen) {
|
|
cc = 0;
|
|
} else if (destlen < srclen) {
|
|
cc = 1;
|
|
} else {
|
|
cc = 2;
|
|
}
|
|
|
|
if (srclen > destlen) {
|
|
srclen = destlen;
|
|
}
|
|
|
|
for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
|
|
v = cpu_ldub_data(env, src);
|
|
cpu_stb_data(env, dest, v);
|
|
}
|
|
|
|
for (; destlen; dest++, destlen--) {
|
|
cpu_stb_data(env, dest, pad);
|
|
}
|
|
|
|
env->regs[r1 + 1] = destlen;
|
|
/* can't use srclen here, we trunc'ed it */
|
|
/* FIXME: 31-bit mode! */
|
|
env->regs[r3 + 1] -= src - env->regs[r3];
|
|
env->regs[r1] = dest;
|
|
env->regs[r3] = src;
|
|
|
|
return cc;
|
|
}
|
|
|
|
/* compare logical long extended memcompare insn with padding */
|
|
uint32_t HELPER(clcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
|
|
uint32_t r3)
|
|
{
|
|
uint64_t destlen = env->regs[r1 + 1];
|
|
uint64_t dest = get_address_31fix(env, r1);
|
|
uint64_t srclen = env->regs[r3 + 1];
|
|
uint64_t src = get_address_31fix(env, r3);
|
|
uint8_t pad = a2 & 0xff;
|
|
uint8_t v1 = 0, v2 = 0;
|
|
uint32_t cc = 0;
|
|
|
|
if (!(destlen || srclen)) {
|
|
return cc;
|
|
}
|
|
|
|
if (srclen > destlen) {
|
|
srclen = destlen;
|
|
}
|
|
|
|
for (; destlen || srclen; src++, dest++, destlen--, srclen--) {
|
|
v1 = srclen ? cpu_ldub_data(env, src) : pad;
|
|
v2 = destlen ? cpu_ldub_data(env, dest) : pad;
|
|
if (v1 != v2) {
|
|
cc = (v1 < v2) ? 1 : 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
env->regs[r1 + 1] = destlen;
|
|
/* can't use srclen here, we trunc'ed it */
|
|
env->regs[r3 + 1] -= src - env->regs[r3];
|
|
env->regs[r1] = dest;
|
|
env->regs[r3] = src;
|
|
|
|
return cc;
|
|
}
|
|
|
|
/* checksum */
|
|
uint64_t HELPER(cksm)(CPUS390XState *env, uint64_t r1,
|
|
uint64_t src, uint64_t src_len)
|
|
{
|
|
uint64_t max_len, len;
|
|
uint64_t cksm = (uint32_t)r1;
|
|
|
|
/* Lest we fail to service interrupts in a timely manner, limit the
|
|
amount of work we're willing to do. For now, let's cap at 8k. */
|
|
max_len = (src_len > 0x2000 ? 0x2000 : src_len);
|
|
|
|
/* Process full words as available. */
|
|
for (len = 0; len + 4 <= max_len; len += 4, src += 4) {
|
|
cksm += (uint32_t)cpu_ldl_data(env, src);
|
|
}
|
|
|
|
switch (max_len - len) {
|
|
case 1:
|
|
cksm += cpu_ldub_data(env, src) << 24;
|
|
len += 1;
|
|
break;
|
|
case 2:
|
|
cksm += cpu_lduw_data(env, src) << 16;
|
|
len += 2;
|
|
break;
|
|
case 3:
|
|
cksm += cpu_lduw_data(env, src) << 16;
|
|
cksm += cpu_ldub_data(env, src + 2) << 8;
|
|
len += 3;
|
|
break;
|
|
}
|
|
|
|
/* Fold the carry from the checksum. Note that we can see carry-out
|
|
during folding more than once (but probably not more than twice). */
|
|
while (cksm > 0xffffffffull) {
|
|
cksm = (uint32_t)cksm + (cksm >> 32);
|
|
}
|
|
|
|
/* Indicate whether or not we've processed everything. */
|
|
env->cc_op = (len == src_len ? 0 : 3);
|
|
|
|
/* Return both cksm and processed length. */
|
|
env->retxl = cksm;
|
|
return len;
|
|
}
|
|
|
|
void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
|
|
uint64_t src)
|
|
{
|
|
int len_dest = len >> 4;
|
|
int len_src = len & 0xf;
|
|
uint8_t b;
|
|
int second_nibble = 0;
|
|
|
|
dest += len_dest;
|
|
src += len_src;
|
|
|
|
/* last byte is special, it only flips the nibbles */
|
|
b = cpu_ldub_data(env, src);
|
|
cpu_stb_data(env, dest, (b << 4) | (b >> 4));
|
|
src--;
|
|
len_src--;
|
|
|
|
/* now pad every nibble with 0xf0 */
|
|
|
|
while (len_dest > 0) {
|
|
uint8_t cur_byte = 0;
|
|
|
|
if (len_src > 0) {
|
|
cur_byte = cpu_ldub_data(env, src);
|
|
}
|
|
|
|
len_dest--;
|
|
dest--;
|
|
|
|
/* only advance one nibble at a time */
|
|
if (second_nibble) {
|
|
cur_byte >>= 4;
|
|
len_src--;
|
|
src--;
|
|
}
|
|
second_nibble = !second_nibble;
|
|
|
|
/* digit */
|
|
cur_byte = (cur_byte & 0xf);
|
|
/* zone bits */
|
|
cur_byte |= 0xf0;
|
|
|
|
cpu_stb_data(env, dest, cur_byte);
|
|
}
|
|
}
|
|
|
|
void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array,
|
|
uint64_t trans)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= len; i++) {
|
|
uint8_t byte = cpu_ldub_data(env, array + i);
|
|
uint8_t new_byte = cpu_ldub_data(env, trans + byte);
|
|
|
|
cpu_stb_data(env, array + i, new_byte);
|
|
}
|
|
}
|
|
|
|
uint64_t HELPER(tre)(CPUS390XState *env, uint64_t array,
|
|
uint64_t len, uint64_t trans)
|
|
{
|
|
uint8_t end = env->regs[0] & 0xff;
|
|
uint64_t l = len;
|
|
uint64_t i;
|
|
|
|
if (!(env->psw.mask & PSW_MASK_64)) {
|
|
array &= 0x7fffffff;
|
|
l = (uint32_t)l;
|
|
}
|
|
|
|
/* Lest we fail to service interrupts in a timely manner, limit the
|
|
amount of work we're willing to do. For now, let's cap at 8k. */
|
|
if (l > 0x2000) {
|
|
l = 0x2000;
|
|
env->cc_op = 3;
|
|
} else {
|
|
env->cc_op = 0;
|
|
}
|
|
|
|
for (i = 0; i < l; i++) {
|
|
uint8_t byte, new_byte;
|
|
|
|
byte = cpu_ldub_data(env, array + i);
|
|
|
|
if (byte == end) {
|
|
env->cc_op = 1;
|
|
break;
|
|
}
|
|
|
|
new_byte = cpu_ldub_data(env, trans + byte);
|
|
cpu_stb_data(env, array + i, new_byte);
|
|
}
|
|
|
|
env->retxl = len - i;
|
|
return array + i;
|
|
}
|
|
|
|
uint32_t HELPER(trt)(CPUS390XState *env, uint32_t len, uint64_t array,
|
|
uint64_t trans)
|
|
{
|
|
uint32_t cc = 0;
|
|
int i;
|
|
|
|
for (i = 0; i <= len; i++) {
|
|
uint8_t byte = cpu_ldub_data(env, array + i);
|
|
uint8_t sbyte = cpu_ldub_data(env, trans + byte);
|
|
|
|
if (sbyte != 0) {
|
|
env->regs[1] = array + i;
|
|
env->regs[2] = (env->regs[2] & ~0xff) | sbyte;
|
|
cc = (i == len) ? 2 : 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
void HELPER(lctlg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
bool PERchanged = false;
|
|
int i;
|
|
uint64_t src = a2;
|
|
uint64_t val;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
val = cpu_ldq_data(env, src);
|
|
if (env->cregs[i] != val && i >= 9 && i <= 11) {
|
|
PERchanged = true;
|
|
}
|
|
env->cregs[i] = val;
|
|
HELPER_LOG("load ctl %d from 0x%" PRIx64 " == 0x%" PRIx64 "\n",
|
|
i, src, env->cregs[i]);
|
|
src += sizeof(uint64_t);
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (PERchanged && env->psw.mask & PSW_MASK_PER) {
|
|
s390_cpu_recompute_watchpoints(CPU(cpu));
|
|
}
|
|
|
|
tlb_flush(CPU(cpu), 1);
|
|
}
|
|
|
|
void HELPER(lctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
bool PERchanged = false;
|
|
int i;
|
|
uint64_t src = a2;
|
|
uint32_t val;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
val = cpu_ldl_data(env, src);
|
|
if ((uint32_t)env->cregs[i] != val && i >= 9 && i <= 11) {
|
|
PERchanged = true;
|
|
}
|
|
env->cregs[i] = (env->cregs[i] & 0xFFFFFFFF00000000ULL) | val;
|
|
src += sizeof(uint32_t);
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (PERchanged && env->psw.mask & PSW_MASK_PER) {
|
|
s390_cpu_recompute_watchpoints(CPU(cpu));
|
|
}
|
|
|
|
tlb_flush(CPU(cpu), 1);
|
|
}
|
|
|
|
void HELPER(stctg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
int i;
|
|
uint64_t dest = a2;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
cpu_stq_data(env, dest, env->cregs[i]);
|
|
dest += sizeof(uint64_t);
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void HELPER(stctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
|
{
|
|
int i;
|
|
uint64_t dest = a2;
|
|
|
|
for (i = r1;; i = (i + 1) % 16) {
|
|
cpu_stl_data(env, dest, env->cregs[i]);
|
|
dest += sizeof(uint32_t);
|
|
|
|
if (i == r3) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t HELPER(tprot)(uint64_t a1, uint64_t a2)
|
|
{
|
|
/* XXX implement */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* insert storage key extended */
|
|
uint64_t HELPER(iske)(CPUS390XState *env, uint64_t r2)
|
|
{
|
|
static S390SKeysState *ss;
|
|
static S390SKeysClass *skeyclass;
|
|
uint64_t addr = get_address(env, 0, 0, r2);
|
|
uint8_t key;
|
|
|
|
if (addr > ram_size) {
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(!ss)) {
|
|
ss = s390_get_skeys_device();
|
|
skeyclass = S390_SKEYS_GET_CLASS(ss);
|
|
}
|
|
|
|
if (skeyclass->get_skeys(ss, addr / TARGET_PAGE_SIZE, 1, &key)) {
|
|
return 0;
|
|
}
|
|
return key;
|
|
}
|
|
|
|
/* set storage key extended */
|
|
void HELPER(sske)(CPUS390XState *env, uint64_t r1, uint64_t r2)
|
|
{
|
|
static S390SKeysState *ss;
|
|
static S390SKeysClass *skeyclass;
|
|
uint64_t addr = get_address(env, 0, 0, r2);
|
|
uint8_t key;
|
|
|
|
if (addr > ram_size) {
|
|
return;
|
|
}
|
|
|
|
if (unlikely(!ss)) {
|
|
ss = s390_get_skeys_device();
|
|
skeyclass = S390_SKEYS_GET_CLASS(ss);
|
|
}
|
|
|
|
key = (uint8_t) r1;
|
|
skeyclass->set_skeys(ss, addr / TARGET_PAGE_SIZE, 1, &key);
|
|
}
|
|
|
|
/* reset reference bit extended */
|
|
uint32_t HELPER(rrbe)(CPUS390XState *env, uint64_t r2)
|
|
{
|
|
static S390SKeysState *ss;
|
|
static S390SKeysClass *skeyclass;
|
|
uint8_t re, key;
|
|
|
|
if (r2 > ram_size) {
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(!ss)) {
|
|
ss = s390_get_skeys_device();
|
|
skeyclass = S390_SKEYS_GET_CLASS(ss);
|
|
}
|
|
|
|
if (skeyclass->get_skeys(ss, r2 / TARGET_PAGE_SIZE, 1, &key)) {
|
|
return 0;
|
|
}
|
|
|
|
re = key & (SK_R | SK_C);
|
|
key &= ~SK_R;
|
|
|
|
if (skeyclass->set_skeys(ss, r2 / TARGET_PAGE_SIZE, 1, &key)) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* cc
|
|
*
|
|
* 0 Reference bit zero; change bit zero
|
|
* 1 Reference bit zero; change bit one
|
|
* 2 Reference bit one; change bit zero
|
|
* 3 Reference bit one; change bit one
|
|
*/
|
|
|
|
return re >> 1;
|
|
}
|
|
|
|
/* compare and swap and purge */
|
|
uint32_t HELPER(csp)(CPUS390XState *env, uint32_t r1, uint64_t r2)
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
uint32_t cc;
|
|
uint32_t o1 = env->regs[r1];
|
|
uint64_t a2 = r2 & ~3ULL;
|
|
uint32_t o2 = cpu_ldl_data(env, a2);
|
|
|
|
if (o1 == o2) {
|
|
cpu_stl_data(env, a2, env->regs[(r1 + 1) & 15]);
|
|
if (r2 & 0x3) {
|
|
/* flush TLB / ALB */
|
|
tlb_flush(CPU(cpu), 1);
|
|
}
|
|
cc = 0;
|
|
} else {
|
|
env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) | o2;
|
|
cc = 1;
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2)
|
|
{
|
|
int cc = 0, i;
|
|
|
|
HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n",
|
|
__func__, l, a1, a2);
|
|
|
|
if (l > 256) {
|
|
/* max 256 */
|
|
l = 256;
|
|
cc = 3;
|
|
}
|
|
|
|
/* XXX replace w/ memcpy */
|
|
for (i = 0; i < l; i++) {
|
|
cpu_stb_secondary(env, a1 + i, cpu_ldub_primary(env, a2 + i));
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2)
|
|
{
|
|
int cc = 0, i;
|
|
|
|
HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n",
|
|
__func__, l, a1, a2);
|
|
|
|
if (l > 256) {
|
|
/* max 256 */
|
|
l = 256;
|
|
cc = 3;
|
|
}
|
|
|
|
/* XXX replace w/ memcpy */
|
|
for (i = 0; i < l; i++) {
|
|
cpu_stb_primary(env, a1 + i, cpu_ldub_secondary(env, a2 + i));
|
|
}
|
|
|
|
return cc;
|
|
}
|
|
|
|
/* invalidate pte */
|
|
void HELPER(ipte)(CPUS390XState *env, uint64_t pte_addr, uint64_t vaddr)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
uint64_t page = vaddr & TARGET_PAGE_MASK;
|
|
uint64_t pte = 0;
|
|
|
|
/* XXX broadcast to other CPUs */
|
|
|
|
/* XXX Linux is nice enough to give us the exact pte address.
|
|
According to spec we'd have to find it out ourselves */
|
|
/* XXX Linux is fine with overwriting the pte, the spec requires
|
|
us to only set the invalid bit */
|
|
stq_phys(cs->as, pte_addr, pte | _PAGE_INVALID);
|
|
|
|
/* XXX we exploit the fact that Linux passes the exact virtual
|
|
address here - it's not obliged to! */
|
|
tlb_flush_page(cs, page);
|
|
|
|
/* XXX 31-bit hack */
|
|
if (page & 0x80000000) {
|
|
tlb_flush_page(cs, page & ~0x80000000);
|
|
} else {
|
|
tlb_flush_page(cs, page | 0x80000000);
|
|
}
|
|
}
|
|
|
|
/* flush local tlb */
|
|
void HELPER(ptlb)(CPUS390XState *env)
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
|
|
tlb_flush(CPU(cpu), 1);
|
|
}
|
|
|
|
/* load using real address */
|
|
uint64_t HELPER(lura)(CPUS390XState *env, uint64_t addr)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
|
|
return (uint32_t)ldl_phys(cs->as, get_address(env, 0, 0, addr));
|
|
}
|
|
|
|
uint64_t HELPER(lurag)(CPUS390XState *env, uint64_t addr)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
|
|
return ldq_phys(cs->as, get_address(env, 0, 0, addr));
|
|
}
|
|
|
|
/* store using real address */
|
|
void HELPER(stura)(CPUS390XState *env, uint64_t addr, uint64_t v1)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
|
|
stl_phys(cs->as, get_address(env, 0, 0, addr), (uint32_t)v1);
|
|
|
|
if ((env->psw.mask & PSW_MASK_PER) &&
|
|
(env->cregs[9] & PER_CR9_EVENT_STORE) &&
|
|
(env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) {
|
|
/* PSW is saved just before calling the helper. */
|
|
env->per_address = env->psw.addr;
|
|
env->per_perc_atmid = PER_CODE_EVENT_STORE_REAL | get_per_atmid(env);
|
|
}
|
|
}
|
|
|
|
void HELPER(sturg)(CPUS390XState *env, uint64_t addr, uint64_t v1)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
|
|
stq_phys(cs->as, get_address(env, 0, 0, addr), v1);
|
|
|
|
if ((env->psw.mask & PSW_MASK_PER) &&
|
|
(env->cregs[9] & PER_CR9_EVENT_STORE) &&
|
|
(env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) {
|
|
/* PSW is saved just before calling the helper. */
|
|
env->per_address = env->psw.addr;
|
|
env->per_perc_atmid = PER_CODE_EVENT_STORE_REAL | get_per_atmid(env);
|
|
}
|
|
}
|
|
|
|
/* load real address */
|
|
uint64_t HELPER(lra)(CPUS390XState *env, uint64_t addr)
|
|
{
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
uint32_t cc = 0;
|
|
int old_exc = cs->exception_index;
|
|
uint64_t asc = env->psw.mask & PSW_MASK_ASC;
|
|
uint64_t ret;
|
|
int flags;
|
|
|
|
/* XXX incomplete - has more corner cases */
|
|
if (!(env->psw.mask & PSW_MASK_64) && (addr >> 32)) {
|
|
program_interrupt(env, PGM_SPECIAL_OP, 2);
|
|
}
|
|
|
|
cs->exception_index = old_exc;
|
|
if (mmu_translate(env, addr, 0, asc, &ret, &flags, true)) {
|
|
cc = 3;
|
|
}
|
|
if (cs->exception_index == EXCP_PGM) {
|
|
ret = env->int_pgm_code | 0x80000000;
|
|
} else {
|
|
ret |= addr & ~TARGET_PAGE_MASK;
|
|
}
|
|
cs->exception_index = old_exc;
|
|
|
|
env->cc_op = cc;
|
|
return ret;
|
|
}
|
|
#endif
|