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target/openrisc: Move VR, UPR, DMMCFGR, IMMCFGR to cpu init 

These registers are read-only and implementation specific.
Initiailize VR for the first time; take the OR1200 values
from the verilog source.

Note that moving fields within CPUOpenRISCState does not
affect migration.

Reviewed-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
Richard Henderson 2019-08-25 15:02:54 -07:00
parent b72e3ff658
commit c7efab4fc1
3 changed files with 22 additions and 13 deletions
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23
target/openrisc/cpu.c
View File

@ -56,13 +56,6 @@ static void openrisc_cpu_reset(CPUState *s)
cpu->env.lock_addr = -1;
s->exception_index = -1;
cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP |
UPR_PMP;
cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
#ifndef CONFIG_USER_ONLY
cpu->env.picmr = 0x00000000;
cpu->env.picsr = 0x00000000;
@ -117,15 +110,31 @@ static void or1200_initfn(Object *obj)
{
OpenRISCCPU *cpu = OPENRISC_CPU(obj);
cpu->env.vr = 0x13000008;
cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
CPUCFGR_EVBARP;
/* 1Way, TLB_SIZE entries. */
cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
}
static void openrisc_any_initfn(Object *obj)
{
OpenRISCCPU *cpu = OPENRISC_CPU(obj);
cpu->env.vr = 0x13000000;
cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_EVBARP;
/* 1Way, TLB_SIZE entries. */
cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
| (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
| (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
}
static void openrisc_cpu_class_init(ObjectClass *oc, void *data)

8
target/openrisc/cpu.h
View File

@ -260,10 +260,6 @@ typedef struct CPUOpenRISCState {
target_ulong sr_cy; /* the SR_CY bit, values 0, 1. */
target_long sr_ov; /* the SR_OV bit (in the sign bit only) */
uint32_t sr; /* Supervisor register, without SR_{F,CY,OV} */
uint32_t vr; /* Version register */
uint32_t upr; /* Unit presence register */
uint32_t dmmucfgr; /* DMMU configure register */
uint32_t immucfgr; /* IMMU configure register */
uint32_t esr; /* Exception supervisor register */
uint32_t evbar; /* Exception vector base address register */
uint32_t pmr; /* Power Management Register */
@ -283,7 +279,11 @@ typedef struct CPUOpenRISCState {
struct {} end_reset_fields;
/* Fields from here on are preserved across CPU reset. */
uint32_t vr; /* Version register */
uint32_t upr; /* Unit presence register */
uint32_t cpucfgr; /* CPU configure register */
uint32_t dmmucfgr; /* DMMU configure register */
uint32_t immucfgr; /* IMMU configure register */
#ifndef CONFIG_USER_ONLY
QEMUTimer *timer;

4
target/openrisc/sys_helper.c
View File

@ -199,13 +199,13 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
return env->vr;
case TO_SPR(0, 1): /* UPR */
return env->upr; /* TT, DM, IM, UP present */
return env->upr;
case TO_SPR(0, 2): /* CPUCFGR */
return env->cpucfgr;
case TO_SPR(0, 3): /* DMMUCFGR */
return env->dmmucfgr; /* 1Way, 64 entries */
return env->dmmucfgr;
case TO_SPR(0, 4): /* IMMUCFGR */
return env->immucfgr;