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Implement ARMv7 MMU access permissions. 

Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6099 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-12-19 12:39:00 +00:00
parent 564e571add
commit d4934d18f3
1 changed files with 11 additions and 1 deletions
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12
target-arm/helper.c
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@ -900,12 +900,16 @@ static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
return PAGE_READ | PAGE_WRITE;
case 3:
return PAGE_READ | PAGE_WRITE;
case 4: case 7: /* Reserved. */
case 4: /* Reserved. */
return 0;
case 5:
return is_user ? 0 : prot_ro;
case 6:
return prot_ro;
case 7:
if (!arm_feature (env, ARM_FEATURE_V7))
return 0;
return prot_ro;
default:
abort();
}
@ -1085,6 +1089,12 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
if (xn && access_type == 2)
goto do_fault;
/* The simplified model uses AP[0] as an access control bit. */
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) {
/* Access flag fault. */
code = (code == 15) ? 6 : 3;
goto do_fault;
}
*prot = check_ap(env, ap, domain, access_type, is_user);
if (!*prot) {
/* Access permission fault. */