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target-arm: Convert cp15 VA-PA translation registers 

Convert the cp15 VA-PA translation registers (a subset of
the crn=7 regs) to the new scheme.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2012-06-20 11:57:16 +00:00
parent d929823fa1
commit 4a50160666
1 changed files with 65 additions and 43 deletions
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108
target-arm/helper.c
View File

@ -4,6 +4,13 @@
#include "host-utils.h"
#include "sysemu.h"
#ifndef CONFIG_USER_ONLY
static inline int get_phys_addr(CPUARMState *env, uint32_t address,
int access_type, int is_user,
uint32_t *phys_ptr, int *prot,
target_ulong *page_size);
#endif
static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
{
int nregs;
@ -416,6 +423,61 @@ static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
REGINFO_SENTINEL
};
static int par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
if (arm_feature(env, ARM_FEATURE_V7)) {
env->cp15.c7_par = value & 0xfffff6ff;
} else {
env->cp15.c7_par = value & 0xfffff1ff;
}
return 0;
}
#ifndef CONFIG_USER_ONLY
/* get_phys_addr() isn't present for user-mode-only targets */
static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
uint32_t phys_addr;
target_ulong page_size;
int prot;
int ret, is_user = ri->opc2 & 2;
int access_type = ri->opc2 & 1;
if (ri->opc2 & 4) {
/* Other states are only available with TrustZone */
return EXCP_UDEF;
}
ret = get_phys_addr(env, value, access_type, is_user,
&phys_addr, &prot, &page_size);
if (ret == 0) {
/* We do not set any attribute bits in the PAR */
if (page_size == (1 << 24)
&& arm_feature(env, ARM_FEATURE_V7)) {
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
} else {
env->cp15.c7_par = phys_addr & 0xfffff000;
}
} else {
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) |
((ret & (12 << 1)) >> 6) |
((ret & 0xf) << 1) | 1;
}
return 0;
}
#endif
static const ARMCPRegInfo vapa_cp_reginfo[] = {
{ .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .resetvalue = 0,
.fieldoffset = offsetof(CPUARMState, cp15.c7_par),
.writefn = par_write },
#ifndef CONFIG_USER_ONLY
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_W, .writefn = ats_write },
#endif
REGINFO_SENTINEL
};
/* Return basic MPU access permission bits. */
static uint32_t simple_mpu_ap_bits(uint32_t val)
{
@ -673,6 +735,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_VAPA)) {
define_arm_cp_regs(cpu, vapa_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
define_arm_cp_regs(cpu, omap_cp_reginfo);
}
@ -1837,46 +1902,6 @@ void HELPER(set_cp15)(CPUARMState *env, uint32_t insn, uint32_t val)
if (op1 != 0) {
goto bad_reg;
}
/* No cache, so nothing to do except VA->PA translations. */
if (arm_feature(env, ARM_FEATURE_VAPA)) {
switch (crm) {
case 4:
if (arm_feature(env, ARM_FEATURE_V7)) {
env->cp15.c7_par = val & 0xfffff6ff;
} else {
env->cp15.c7_par = val & 0xfffff1ff;
}
break;
case 8: {
uint32_t phys_addr;
target_ulong page_size;
int prot;
int ret, is_user = op2 & 2;
int access_type = op2 & 1;
if (op2 & 4) {
/* Other states are only available with TrustZone */
goto bad_reg;
}
ret = get_phys_addr(env, val, access_type, is_user,
&phys_addr, &prot, &page_size);
if (ret == 0) {
/* We do not set any attribute bits in the PAR */
if (page_size == (1 << 24)
&& arm_feature(env, ARM_FEATURE_V7)) {
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
} else {
env->cp15.c7_par = phys_addr & 0xfffff000;
}
} else {
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) |
((ret & (12 << 1)) >> 6) |
((ret & 0xf) << 1) | 1;
}
break;
}
}
}
break;
case 9:
if (arm_feature(env, ARM_FEATURE_OMAPCP))
@ -2084,9 +2109,6 @@ uint32_t HELPER(get_cp15)(CPUARMState *env, uint32_t insn)
}
}
case 7: /* Cache control. */
if (crm == 4 && op1 == 0 && op2 == 0) {
return env->cp15.c7_par;
}
/* FIXME: Should only clear Z flag if destination is r15. */
env->ZF = 0;
return 0;