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[Qemu-devel] [PATCH 20/29] target-sparc: simplify ultrasparc_tsb_pointer
From: |
Artyom Tarasenko |
Subject: |
[Qemu-devel] [PATCH 20/29] target-sparc: simplify ultrasparc_tsb_pointer |
Date: |
Sat, 1 Oct 2016 12:05:24 +0200 |
Signed-off-by: Artyom Tarasenko <address@hidden>
---
target-sparc/ldst_helper.c | 51 ++++++++++++++--------------------------------
1 file changed, 15 insertions(+), 36 deletions(-)
diff --git a/target-sparc/ldst_helper.c b/target-sparc/ldst_helper.c
index 8d788fa..a85552e 100644
--- a/target-sparc/ldst_helper.c
+++ b/target-sparc/ldst_helper.c
@@ -70,44 +70,35 @@
#define QT1 (env->qt1)
#if defined(TARGET_SPARC64) && !defined(CONFIG_USER_ONLY)
-static uint64_t ultrasparc_tsb_pointer(CPUSPARCState *env, uint64_t tsb,
- uint64_t *tsb_ptr,
- uint64_t tag_access_register,
- int idx, uint64_t *cfg_ptr)
/* Calculates TSB pointer value for fault page size
* UltraSPARC IIi has fixed sizes (8k or 64k) for the page pointers
* UA2005 holds the page size configuration in mmu_ctx registers */
+static uint64_t ultrasparc_tsb_pointer(CPUSPARCState *env, SparcV9MMU mmu,
+ int idx)
{
uint64_t tsb_register;
int page_size;
if (cpu_has_hypervisor(env)) {
int tsb_index = 0;
- int ctx = tag_access_register & 0x1fffULL;
- uint64_t ctx_register = cfg_ptr[ctx ? 1 : 0];
+ int ctx = mmu.tag_access & 0x1fffULL;
+ uint64_t ctx_register = mmu.sun4v_ctx_config[ctx ? 1 : 0];
tsb_index = idx;
tsb_index |= ctx ? 2 : 0;
page_size = idx ? ctx_register >> 8 : ctx_register;
page_size &= 7;
- tsb_register = tsb_ptr[tsb_index];
+ tsb_register = mmu.sun4v_tsb_pointers[tsb_index];
} else {
page_size = idx;
- tsb_register = tsb;
+ tsb_register = mmu.tsb;
}
- uint64_t tsb_base = tsb_register & ~0x1fffULL;
int tsb_split = (tsb_register & 0x1000ULL) ? 1 : 0;
int tsb_size = tsb_register & 0xf;
- /* discard lower 13 bits which hold tag access context */
- uint64_t tag_access_va = tag_access_register & ~0x1fffULL;
+ uint64_t tsb_base_mask = (~0x1fffULL) << tsb_size;
- /* now reorder bits */
- uint64_t tsb_base_mask = ~0x1fffULL;
- uint64_t va = tag_access_va;
-
- /* move va bits to correct position */
- va >>= 3 * page_size + 9;
-
- tsb_base_mask <<= tsb_size;
+ /* move va bits to correct position,
+ * the context bits will be masked out later */
+ uint64_t va = mmu.tag_access >> (3 * page_size + 9);
/* calculate tsb_base mask and adjust va if split is in use */
if (tsb_split) {
@@ -119,7 +110,7 @@ static uint64_t ultrasparc_tsb_pointer(CPUSPARCState *env,
uint64_t tsb,
tsb_base_mask <<= 1;
}
- return ((tsb_base & tsb_base_mask) | (va & ~tsb_base_mask)) & ~0xfULL;
+ return ((tsb_register & tsb_base_mask) | (va & ~tsb_base_mask)) & ~0xfULL;
}
/* Calculates tag target register value by reordering bits
@@ -1516,20 +1507,14 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong
addr,
{
/* env->immuregs[5] holds I-MMU TSB register value
env->immuregs[6] holds I-MMU Tag Access register value */
- ret = ultrasparc_tsb_pointer(env, env->immu.tsb,
- env->immu.sun4v_tsb_pointers,
- env->immu.tag_access,
- 0, env->immu.sun4v_ctx_config);
+ ret = ultrasparc_tsb_pointer(env, env->immu, 0);
break;
}
case ASI_IMMU_TSB_64KB_PTR: /* I-MMU 64k TSB pointer */
{
/* env->immuregs[5] holds I-MMU TSB register value
env->immuregs[6] holds I-MMU Tag Access register value */
- ret = ultrasparc_tsb_pointer(env, env->immu.tsb,
- env->immu.sun4v_tsb_pointers,
- env->immu.tag_access,
- 1, env->immu.sun4v_ctx_config);
+ ret = ultrasparc_tsb_pointer(env, env->immu, 1);
break;
}
case ASI_ITLB_DATA_ACCESS: /* I-MMU data access */
@@ -1588,20 +1573,14 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong
addr,
{
/* env->dmmuregs[5] holds D-MMU TSB register value
env->dmmuregs[6] holds D-MMU Tag Access register value */
- ret = ultrasparc_tsb_pointer(env, env->dmmu.tsb,
- env->dmmu.sun4v_tsb_pointers,
- env->dmmu.tag_access,
- 0, env->dmmu.sun4v_ctx_config);
+ ret = ultrasparc_tsb_pointer(env, env->dmmu, 0);
break;
}
case ASI_DMMU_TSB_64KB_PTR: /* D-MMU 64k TSB pointer */
{
/* env->dmmuregs[5] holds D-MMU TSB register value
env->dmmuregs[6] holds D-MMU Tag Access register value */
- ret = ultrasparc_tsb_pointer(env, env->dmmu.tsb,
- env->dmmu.sun4v_tsb_pointers,
- env->dmmu.tag_access,
- 1, env->dmmu.sun4v_ctx_config);
+ ret = ultrasparc_tsb_pointer(env, env->dmmu, 1);
break;
}
case ASI_DTLB_DATA_ACCESS: /* D-MMU data access */
--
2.7.2
- Re: [Qemu-devel] [PATCH 15/29] target-sparc: allow priveleged ASIs in hyperprivileged mode, (continued)
- [Qemu-devel] [PATCH 16/29] target-sparc: ignore writes to UA2005 CPU mondo queue register, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 17/29] target-sparc: replace the last tlb entry when no free entries left, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 18/29] target-sparc: use SparcV9MMU type for sparc64 I/D-MMUs, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 19/29] target-sparc: implement UA2005 TSB Pointers, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 21/29] target-sparc: allow 256M sized pages, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 20/29] target-sparc: simplify ultrasparc_tsb_pointer,
Artyom Tarasenko <=
- [Qemu-devel] [PATCH 22/29] target-sparc: implement auto-demapping for UA2005 CPUs, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 24/29] target-sparc: add more registers to dump_mmu, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 23/29] target-sparc: implement ST_BLKINIT_ ASIs, Artyom Tarasenko, 2016/10/01
- [Qemu-devel] [PATCH 25/29] target-sparc: implement UA2005 ASI_MMU (0x21), Artyom Tarasenko, 2016/10/01