The openrisc code uses an old style of interrupt handling, where a separate standalone set of qemu_irqs invoke a function openrisc_pic_cpu_handler() which signals the interrupt to the CPU proper by directly calling cpu_interrupt() and cpu_reset_interrupt(). Because CPU objects now inherit (indirectly) from TYPE_DEVICE, they can have GPIO input lines themselves, and the neater modern way to implement this is to simply have the CPU object itself provide the input IRQ lines. Create GPIO inputs to the OpenRISC CPU object, and make the only user of cpu_openrisc_pic_init() wire up directly to those instead. This allows us to delete the hw/openrisc/pic_cpu.c file entirely. This fixes a trivial memory leak reported by Coverity of the IRQs allocated in cpu_openrisc_pic_init(). Fixes: Coverity CID 1421934 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stafford Horne <shorne@gmail.com> Message-id: 20201127225127.14770-4-peter.maydell@linaro.org
269 lines
7.8 KiB
C
269 lines
7.8 KiB
C
/*
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* QEMU OpenRISC CPU
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*
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* Copyright (c) 2012 Jia Liu <proljc@gmail.com>
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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 2.1 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 "qapi/error.h"
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#include "qemu/qemu-print.h"
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#include "cpu.h"
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static void openrisc_cpu_set_pc(CPUState *cs, vaddr value)
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{
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OpenRISCCPU *cpu = OPENRISC_CPU(cs);
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cpu->env.pc = value;
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cpu->env.dflag = 0;
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}
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static bool openrisc_cpu_has_work(CPUState *cs)
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{
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return cs->interrupt_request & (CPU_INTERRUPT_HARD |
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CPU_INTERRUPT_TIMER);
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}
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static void openrisc_disas_set_info(CPUState *cpu, disassemble_info *info)
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{
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info->print_insn = print_insn_or1k;
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}
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static void openrisc_cpu_reset(DeviceState *dev)
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{
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CPUState *s = CPU(dev);
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OpenRISCCPU *cpu = OPENRISC_CPU(s);
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OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
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occ->parent_reset(dev);
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memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields));
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cpu->env.pc = 0x100;
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cpu->env.sr = SR_FO | SR_SM;
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cpu->env.lock_addr = -1;
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s->exception_index = -1;
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cpu_set_fpcsr(&cpu->env, 0);
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#ifndef CONFIG_USER_ONLY
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cpu->env.picmr = 0x00000000;
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cpu->env.picsr = 0x00000000;
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cpu->env.ttmr = 0x00000000;
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#endif
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}
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#ifndef CONFIG_USER_ONLY
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static void openrisc_cpu_set_irq(void *opaque, int irq, int level)
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{
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OpenRISCCPU *cpu = (OpenRISCCPU *)opaque;
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CPUState *cs = CPU(cpu);
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uint32_t irq_bit;
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if (irq > 31 || irq < 0) {
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return;
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}
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irq_bit = 1U << irq;
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if (level) {
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cpu->env.picsr |= irq_bit;
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} else {
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cpu->env.picsr &= ~irq_bit;
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}
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if (cpu->env.picsr & cpu->env.picmr) {
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cpu_interrupt(cs, CPU_INTERRUPT_HARD);
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} else {
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cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
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cpu->env.picsr = 0;
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}
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}
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#endif
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static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp)
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{
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CPUState *cs = CPU(dev);
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OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(dev);
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Error *local_err = NULL;
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cpu_exec_realizefn(cs, &local_err);
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if (local_err != NULL) {
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error_propagate(errp, local_err);
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return;
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}
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qemu_init_vcpu(cs);
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cpu_reset(cs);
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occ->parent_realize(dev, errp);
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}
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static void openrisc_cpu_initfn(Object *obj)
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{
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OpenRISCCPU *cpu = OPENRISC_CPU(obj);
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cpu_set_cpustate_pointers(cpu);
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#ifndef CONFIG_USER_ONLY
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qdev_init_gpio_in_named(DEVICE(cpu), openrisc_cpu_set_irq, "IRQ", NR_IRQS);
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#endif
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}
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/* CPU models */
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static ObjectClass *openrisc_cpu_class_by_name(const char *cpu_model)
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{
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ObjectClass *oc;
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char *typename;
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typename = g_strdup_printf(OPENRISC_CPU_TYPE_NAME("%s"), cpu_model);
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oc = object_class_by_name(typename);
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g_free(typename);
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if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_OPENRISC_CPU) ||
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object_class_is_abstract(oc))) {
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return NULL;
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}
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return oc;
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}
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static void or1200_initfn(Object *obj)
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{
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OpenRISCCPU *cpu = OPENRISC_CPU(obj);
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cpu->env.vr = 0x13000008;
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cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
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cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
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CPUCFGR_EVBARP;
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/* 1Way, TLB_SIZE entries. */
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cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
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| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
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cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
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| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
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}
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static void openrisc_any_initfn(Object *obj)
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{
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OpenRISCCPU *cpu = OPENRISC_CPU(obj);
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cpu->env.vr = 0x13000040; /* Obsolete VER + UVRP for new SPRs */
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cpu->env.vr2 = 0; /* No version specific id */
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cpu->env.avr = 0x01030000; /* Architecture v1.3 */
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cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
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cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
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CPUCFGR_AVRP | CPUCFGR_EVBARP | CPUCFGR_OF64A32S;
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/* 1Way, TLB_SIZE entries. */
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cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
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| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
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cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
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| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
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}
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static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
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{
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OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
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CPUClass *cc = CPU_CLASS(occ);
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DeviceClass *dc = DEVICE_CLASS(oc);
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device_class_set_parent_realize(dc, openrisc_cpu_realizefn,
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&occ->parent_realize);
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device_class_set_parent_reset(dc, openrisc_cpu_reset, &occ->parent_reset);
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cc->class_by_name = openrisc_cpu_class_by_name;
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cc->has_work = openrisc_cpu_has_work;
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cc->do_interrupt = openrisc_cpu_do_interrupt;
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cc->cpu_exec_interrupt = openrisc_cpu_exec_interrupt;
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cc->dump_state = openrisc_cpu_dump_state;
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cc->set_pc = openrisc_cpu_set_pc;
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cc->gdb_read_register = openrisc_cpu_gdb_read_register;
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cc->gdb_write_register = openrisc_cpu_gdb_write_register;
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cc->tlb_fill = openrisc_cpu_tlb_fill;
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#ifndef CONFIG_USER_ONLY
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cc->get_phys_page_debug = openrisc_cpu_get_phys_page_debug;
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dc->vmsd = &vmstate_openrisc_cpu;
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#endif
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cc->gdb_num_core_regs = 32 + 3;
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cc->tcg_initialize = openrisc_translate_init;
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cc->disas_set_info = openrisc_disas_set_info;
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}
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/* Sort alphabetically by type name, except for "any". */
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static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
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{
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ObjectClass *class_a = (ObjectClass *)a;
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ObjectClass *class_b = (ObjectClass *)b;
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const char *name_a, *name_b;
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name_a = object_class_get_name(class_a);
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name_b = object_class_get_name(class_b);
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if (strcmp(name_a, "any-" TYPE_OPENRISC_CPU) == 0) {
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return 1;
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} else if (strcmp(name_b, "any-" TYPE_OPENRISC_CPU) == 0) {
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return -1;
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} else {
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return strcmp(name_a, name_b);
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}
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}
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static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
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{
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ObjectClass *oc = data;
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const char *typename;
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char *name;
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typename = object_class_get_name(oc);
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name = g_strndup(typename,
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strlen(typename) - strlen("-" TYPE_OPENRISC_CPU));
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qemu_printf(" %s\n", name);
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g_free(name);
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}
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void cpu_openrisc_list(void)
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{
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GSList *list;
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list = object_class_get_list(TYPE_OPENRISC_CPU, false);
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list = g_slist_sort(list, openrisc_cpu_list_compare);
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qemu_printf("Available CPUs:\n");
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g_slist_foreach(list, openrisc_cpu_list_entry, NULL);
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g_slist_free(list);
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}
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#define DEFINE_OPENRISC_CPU_TYPE(cpu_model, initfn) \
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{ \
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.parent = TYPE_OPENRISC_CPU, \
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.instance_init = initfn, \
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.name = OPENRISC_CPU_TYPE_NAME(cpu_model), \
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}
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static const TypeInfo openrisc_cpus_type_infos[] = {
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{ /* base class should be registered first */
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.name = TYPE_OPENRISC_CPU,
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.parent = TYPE_CPU,
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.instance_size = sizeof(OpenRISCCPU),
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.instance_init = openrisc_cpu_initfn,
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.abstract = true,
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.class_size = sizeof(OpenRISCCPUClass),
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.class_init = openrisc_cpu_class_init,
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},
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DEFINE_OPENRISC_CPU_TYPE("or1200", or1200_initfn),
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DEFINE_OPENRISC_CPU_TYPE("any", openrisc_any_initfn),
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};
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DEFINE_TYPES(openrisc_cpus_type_infos)
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