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target-arm: Add TTBR regime function and use 

Add a utility function for choosing the correct TTBR system register based on
the specified MMU index. Add use of function on physical address lookup.

Signed-off-by: Greg Bellows <greg.bellows@linaro.org>
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1429722561-12651-7-git-send-email-greg.bellows@linaro.org
[PMM: fixed regime_ttbr() return type to be uint64_t]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Greg Bellows 2015-04-22 12:09:18 -05:00 committed by Peter Maydell
parent d82322e175
commit aef878be4e
1 changed files with 19 additions and 5 deletions
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24
target-arm/helper.c
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@ -4913,6 +4913,21 @@ static inline TCR *regime_tcr(CPUARMState *env, ARMMMUIdx mmu_idx)
return &env->cp15.tcr_el[regime_el(env, mmu_idx)];
}
/* Return the TTBR associated with this translation regime */
static inline uint64_t regime_ttbr(CPUARMState *env, ARMMMUIdx mmu_idx,
int ttbrn)
{
if (mmu_idx == ARMMMUIdx_S2NS) {
/* TODO: return VTTBR_EL2 */
g_assert_not_reached();
}
if (ttbrn == 0) {
return env->cp15.ttbr0_el[regime_el(env, mmu_idx)];
} else {
return env->cp15.ttbr1_el[regime_el(env, mmu_idx)];
}
}
/* Return true if the translation regime is using LPAE format page tables */
static inline bool regime_using_lpae_format(CPUARMState *env,
ARMMMUIdx mmu_idx)
@ -5111,7 +5126,6 @@ static bool get_level1_table_address(CPUARMState *env, ARMMMUIdx mmu_idx,
uint32_t *table, uint32_t address)
{
/* Note that we can only get here for an AArch32 PL0/PL1 lookup */
int el = regime_el(env, mmu_idx);
TCR *tcr = regime_tcr(env, mmu_idx);
if (address & tcr->mask) {
@ -5119,13 +5133,13 @@ static bool get_level1_table_address(CPUARMState *env, ARMMMUIdx mmu_idx,
/* Translation table walk disabled for TTBR1 */
return false;
}
*table = env->cp15.ttbr1_el[el] & 0xffffc000;
*table = regime_ttbr(env, mmu_idx, 1) & 0xffffc000;
} else {
if (tcr->raw_tcr & TTBCR_PD0) {
/* Translation table walk disabled for TTBR0 */
return false;
}
*table = env->cp15.ttbr0_el[el] & tcr->base_mask;
*table = regime_ttbr(env, mmu_idx, 0) & tcr->base_mask;
}
*table |= (address >> 18) & 0x3ffc;
return true;
@ -5489,7 +5503,7 @@ static int get_phys_addr_lpae(CPUARMState *env, target_ulong address,
* we will always flush the TLB any time the ASID is changed).
*/
if (ttbr_select == 0) {
ttbr = A32_BANKED_CURRENT_REG_GET(env, ttbr0);
ttbr = regime_ttbr(env, mmu_idx, 0);
epd = extract32(tcr->raw_tcr, 7, 1);
tsz = t0sz;
@ -5501,7 +5515,7 @@ static int get_phys_addr_lpae(CPUARMState *env, target_ulong address,
granule_sz = 11;
}
} else {
ttbr = A32_BANKED_CURRENT_REG_GET(env, ttbr1);
ttbr = regime_ttbr(env, mmu_idx, 1);
epd = extract32(tcr->raw_tcr, 23, 1);
tsz = t1sz;