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arm: Fix CP15 FSR (C5) domain setting 

Return the correct value in the domain field in the cp15 DFSR
(C5) -- bug noticed during Xvisor development.

Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>
[Peter Maydell: reworded commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jean-Christophe DUBOIS 2011-12-13 18:19:23 +00:00 committed by Peter Maydell
parent da5361cc68
commit dd4ebc2ecd
1 changed files with 15 additions and 11 deletions
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26
target-arm/helper.c
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@ -951,13 +951,14 @@ void do_interrupt(CPUARMState *env)
/* Check section/page access permissions.
Returns the page protection flags, or zero if the access is not
permitted. */
static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
int is_user)
static inline int check_ap(CPUState *env, int ap, int domain_prot,
int access_type, int is_user)
{
int prot_ro;
if (domain == 3)
if (domain_prot == 3) {
return PAGE_READ | PAGE_WRITE;
}
if (access_type == 1)
prot_ro = 0;
@ -1023,6 +1024,7 @@ static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
int type;
int ap;
int domain;
int domain_prot;
uint32_t phys_addr;
/* Pagetable walk. */
@ -1030,13 +1032,14 @@ static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
table = get_level1_table_address(env, address);
desc = ldl_phys(table);
type = (desc & 3);
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3;
domain = (desc >> 5) & 0x0f;
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
if (type == 0) {
/* Section translation fault. */
code = 5;
goto do_fault;
}
if (domain == 0 || domain == 2) {
if (domain_prot == 0 || domain_prot == 2) {
if (type == 2)
code = 9; /* Section domain fault. */
else
@ -1094,7 +1097,7 @@ static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
}
code = 15;
}
*prot = check_ap(env, ap, domain, access_type, is_user);
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
if (!*prot) {
/* Access permission fault. */
goto do_fault;
@ -1117,6 +1120,7 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
int type;
int ap;
int domain;
int domain_prot;
uint32_t phys_addr;
/* Pagetable walk. */
@ -1134,10 +1138,10 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
domain = 0;
} else {
/* Section or page. */
domain = (desc >> 4) & 0x1e;
domain = (desc >> 5) & 0x0f;
}
domain = (env->cp15.c3 >> domain) & 3;
if (domain == 0 || domain == 2) {
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
if (domain_prot == 0 || domain_prot == 2) {
if (type == 2)
code = 9; /* Section domain fault. */
else
@ -1182,7 +1186,7 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
}
code = 15;
}
if (domain == 3) {
if (domain_prot == 3) {
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
} else {
if (xn && access_type == 2)
@ -1194,7 +1198,7 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
code = (code == 15) ? 6 : 3;
goto do_fault;
}
*prot = check_ap(env, ap, domain, access_type, is_user);
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
if (!*prot) {
/* Access permission fault. */
goto do_fault;