haraldwolff/qemu-patch-raspberry4
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target-mips: add CMGCRBase register

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Physical base address for the memory-mapped Coherency Manager Global
Configuration Register space.
The MIPS default location for the GCR_BASE address is 0x1FBF_8.
This register only exists if Config3 CMGCR is set to one.

Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
[leon.alrae@imgtec.com: move CMGCR enabling to a separate patch]
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
This commit is contained in:
Yongbok Kim 2016-03-15 09:59:27 +00:00 committed by Leon Alrae
parent 8e7e8a5b7b
commit c870e3f52c
2 changed files with 20 additions and 1 deletions
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3
target-mips/cpu.h
View file

@ -395,6 +395,7 @@ struct CPUMIPSState {
target_ulong CP0_EPC;
int32_t CP0_PRid;
int32_t CP0_EBase;
target_ulong CP0_CMGCRBase;
int32_t CP0_Config0;
#define CP0C0_M 31
#define CP0C0_K23 28
@ -437,7 +438,7 @@ struct CPUMIPSState {
int32_t CP0_Config3;
#define CP0C3_M 31
#define CP0C3_BPG 30
#define CP0C3_CMCGR 29
#define CP0C3_CMGCR 29
#define CP0C3_MSAP 28
#define CP0C3_BP 27
#define CP0C3_BI 26

18
target-mips/translate.c
View file

@ -1432,6 +1432,7 @@ typedef struct DisasContext {
int CP0_LLAddr_shift;
bool ps;
bool vp;
bool cmgcr;
} DisasContext;
enum {
@ -5298,6 +5299,13 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_EBase));
rn = "EBase";
break;
case 3:
check_insn(ctx, ISA_MIPS32R2);
CP0_CHECK(ctx->cmgcr);
tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_CMGCRBase));
tcg_gen_ext32s_tl(arg, arg);
rn = "CMGCRBase";
break;
default:
goto cp0_unimplemented;
}
@ -6572,6 +6580,12 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_EBase));
rn = "EBase";
break;
case 3:
check_insn(ctx, ISA_MIPS32R2);
CP0_CHECK(ctx->cmgcr);
tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_CMGCRBase));
rn = "CMGCRBase";
break;
default:
goto cp0_unimplemented;
}
@ -19663,6 +19677,7 @@ void gen_intermediate_code(CPUMIPSState *env, struct TranslationBlock *tb)
ctx.PAMask = env->PAMask;
ctx.mvh = (env->CP0_Config5 >> CP0C5_MVH) & 1;
ctx.CP0_LLAddr_shift = env->CP0_LLAddr_shift;
ctx.cmgcr = (env->CP0_Config3 >> CP0C3_CMGCR) & 1;
/* Restore delay slot state from the tb context. */
ctx.hflags = (uint32_t)tb->flags; /* FIXME: maybe use 64 bits here? */
ctx.ulri = (env->CP0_Config3 >> CP0C3_ULRI) & 1;
@ -20062,6 +20077,9 @@ void cpu_state_reset(CPUMIPSState *env)
} else {
env->CP0_EBase |= 0x80000000;
}
if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) {
env->CP0_CMGCRBase = 0x1fbf8000 >> 4;
}
env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL);
/* vectored interrupts not implemented, timer on int 7,
no performance counters. */