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authorpbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>2008-10-22 19:22:30 +0000
committerpbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>2008-10-22 19:22:30 +0000
commitb2fa17977f3e9b7ced2cbbe14f6d3c4b3e8e314e (patch)
treeb9f94ee9f7b9a54cd37fa8a2c6d4aca7cd77f97a /target-arm/helper.c
parent83c1f87cc8f865f1f55a2e476cd827aa51089e8c (diff)
Fix ARMv6 translation table base address calculation.
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5514 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-arm/helper.c')
-rw-r--r--target-arm/helper.c41
1 files changed, 20 insertions, 21 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c
index d4af8595ca..a9b31e5d6b 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -168,6 +168,7 @@ void cpu_reset(CPUARMState *env)
if (IS_M(env))
env->uncached_cpsr &= ~CPSR_I;
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
+ env->cp15.c2_base_mask = 0xffffc000u;
#endif
env->regs[15] = 0;
tlb_flush(env, 1);
@@ -910,6 +911,19 @@ static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
}
}
+static uint32_t get_level1_table_address(CPUState *env, uint32_t address)
+{
+ uint32_t table;
+
+ if (address & env->cp15.c2_mask)
+ table = env->cp15.c2_base1 & 0xffffc000;
+ else
+ table = env->cp15.c2_base0 & env->cp15.c2_base_mask;
+
+ table |= (address >> 18) & 0x3ffc;
+ return table;
+}
+
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
int is_user, uint32_t *phys_ptr, int *prot)
{
@@ -923,11 +937,7 @@ static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
/* Pagetable walk. */
/* Lookup l1 descriptor. */
- if (address & env->cp15.c2_mask)
- table = env->cp15.c2_base1;
- else
- table = env->cp15.c2_base0;
- table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc);
+ table = get_level1_table_address(env, address);
desc = ldl_phys(table);
type = (desc & 3);
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3;
@@ -1015,11 +1025,7 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
/* Pagetable walk. */
/* Lookup l1 descriptor. */
- if (address & env->cp15.c2_mask)
- table = env->cp15.c2_base1;
- else
- table = env->cp15.c2_base0;
- table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc);
+ table = get_level1_table_address(env, address);
desc = ldl_phys(table);
type = (desc & 3);
if (type == 0) {
@@ -1365,7 +1371,10 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
env->cp15.c2_base1 = val;
break;
case 2:
+ val &= 7;
+ env->cp15.c2_control = val;
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
+ env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val);
break;
default:
goto bad_reg;
@@ -1683,17 +1692,7 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
case 1:
return env->cp15.c2_base1;
case 2:
- {
- int n;
- uint32_t mask;
- n = 0;
- mask = env->cp15.c2_mask;
- while (mask) {
- n++;
- mask <<= 1;
- }
- return n;
- }
+ return env->cp15.c2_control;
default:
goto bad_reg;
}