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-rw-r--r--include/exec/softmmu_template.h354
1 files changed, 354 insertions, 0 deletions
diff --git a/include/exec/softmmu_template.h b/include/exec/softmmu_template.h
new file mode 100644
index 0000000000..b219191abd
--- /dev/null
+++ b/include/exec/softmmu_template.h
@@ -0,0 +1,354 @@
+/*
+ * Software MMU support
+ *
+ * Generate helpers used by TCG for qemu_ld/st ops and code load
+ * functions.
+ *
+ * Included from target op helpers and exec.c.
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/timer.h"
+#include "exec/memory.h"
+
+#define DATA_SIZE (1 << SHIFT)
+
+#if DATA_SIZE == 8
+#define SUFFIX q
+#define USUFFIX q
+#define DATA_TYPE uint64_t
+#elif DATA_SIZE == 4
+#define SUFFIX l
+#define USUFFIX l
+#define DATA_TYPE uint32_t
+#elif DATA_SIZE == 2
+#define SUFFIX w
+#define USUFFIX uw
+#define DATA_TYPE uint16_t
+#elif DATA_SIZE == 1
+#define SUFFIX b
+#define USUFFIX ub
+#define DATA_TYPE uint8_t
+#else
+#error unsupported data size
+#endif
+
+#ifdef SOFTMMU_CODE_ACCESS
+#define READ_ACCESS_TYPE 2
+#define ADDR_READ addr_code
+#else
+#define READ_ACCESS_TYPE 0
+#define ADDR_READ addr_read
+#endif
+
+static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env,
+ target_ulong addr,
+ int mmu_idx,
+ uintptr_t retaddr);
+static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
+ hwaddr physaddr,
+ target_ulong addr,
+ uintptr_t retaddr)
+{
+ DATA_TYPE res;
+ MemoryRegion *mr = iotlb_to_region(physaddr);
+
+ physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
+ env->mem_io_pc = retaddr;
+ if (mr != &io_mem_ram && mr != &io_mem_rom
+ && mr != &io_mem_unassigned
+ && mr != &io_mem_notdirty
+ && !can_do_io(env)) {
+ cpu_io_recompile(env, retaddr);
+ }
+
+ env->mem_io_vaddr = addr;
+#if SHIFT <= 2
+ res = io_mem_read(mr, physaddr, 1 << SHIFT);
+#else
+#ifdef TARGET_WORDS_BIGENDIAN
+ res = io_mem_read(mr, physaddr, 4) << 32;
+ res |= io_mem_read(mr, physaddr + 4, 4);
+#else
+ res = io_mem_read(mr, physaddr, 4);
+ res |= io_mem_read(mr, physaddr + 4, 4) << 32;
+#endif
+#endif /* SHIFT > 2 */
+ return res;
+}
+
+/* handle all cases except unaligned access which span two pages */
+DATA_TYPE
+glue(glue(helper_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong addr,
+ int mmu_idx)
+{
+ DATA_TYPE res;
+ int index;
+ target_ulong tlb_addr;
+ hwaddr ioaddr;
+ uintptr_t retaddr;
+
+ /* test if there is match for unaligned or IO access */
+ /* XXX: could done more in memory macro in a non portable way */
+ index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+ redo:
+ tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
+ if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
+ if (tlb_addr & ~TARGET_PAGE_MASK) {
+ /* IO access */
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ goto do_unaligned_access;
+ retaddr = GETPC_EXT();
+ ioaddr = env->iotlb[mmu_idx][index];
+ res = glue(io_read, SUFFIX)(env, ioaddr, addr, retaddr);
+ } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
+ /* slow unaligned access (it spans two pages or IO) */
+ do_unaligned_access:
+ retaddr = GETPC_EXT();
+#ifdef ALIGNED_ONLY
+ do_unaligned_access(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
+#endif
+ res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(env, addr,
+ mmu_idx, retaddr);
+ } else {
+ /* unaligned/aligned access in the same page */
+ uintptr_t addend;
+#ifdef ALIGNED_ONLY
+ if ((addr & (DATA_SIZE - 1)) != 0) {
+ retaddr = GETPC_EXT();
+ do_unaligned_access(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
+ }
+#endif
+ addend = env->tlb_table[mmu_idx][index].addend;
+ res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(intptr_t)
+ (addr + addend));
+ }
+ } else {
+ /* the page is not in the TLB : fill it */
+ retaddr = GETPC_EXT();
+#ifdef ALIGNED_ONLY
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ do_unaligned_access(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
+#endif
+ tlb_fill(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
+ goto redo;
+ }
+ return res;
+}
+
+/* handle all unaligned cases */
+static DATA_TYPE
+glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env,
+ target_ulong addr,
+ int mmu_idx,
+ uintptr_t retaddr)
+{
+ DATA_TYPE res, res1, res2;
+ int index, shift;
+ hwaddr ioaddr;
+ target_ulong tlb_addr, addr1, addr2;
+
+ index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+ redo:
+ tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
+ if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
+ if (tlb_addr & ~TARGET_PAGE_MASK) {
+ /* IO access */
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ goto do_unaligned_access;
+ ioaddr = env->iotlb[mmu_idx][index];
+ res = glue(io_read, SUFFIX)(env, ioaddr, addr, retaddr);
+ } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
+ do_unaligned_access:
+ /* slow unaligned access (it spans two pages) */
+ addr1 = addr & ~(DATA_SIZE - 1);
+ addr2 = addr1 + DATA_SIZE;
+ res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(env, addr1,
+ mmu_idx, retaddr);
+ res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(env, addr2,
+ mmu_idx, retaddr);
+ shift = (addr & (DATA_SIZE - 1)) * 8;
+#ifdef TARGET_WORDS_BIGENDIAN
+ res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
+#else
+ res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
+#endif
+ res = (DATA_TYPE)res;
+ } else {
+ /* unaligned/aligned access in the same page */
+ uintptr_t addend = env->tlb_table[mmu_idx][index].addend;
+ res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(intptr_t)
+ (addr + addend));
+ }
+ } else {
+ /* the page is not in the TLB : fill it */
+ tlb_fill(env, addr, READ_ACCESS_TYPE, mmu_idx, retaddr);
+ goto redo;
+ }
+ return res;
+}
+
+#ifndef SOFTMMU_CODE_ACCESS
+
+static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(CPUArchState *env,
+ target_ulong addr,
+ DATA_TYPE val,
+ int mmu_idx,
+ uintptr_t retaddr);
+
+static inline void glue(io_write, SUFFIX)(CPUArchState *env,
+ hwaddr physaddr,
+ DATA_TYPE val,
+ target_ulong addr,
+ uintptr_t retaddr)
+{
+ MemoryRegion *mr = iotlb_to_region(physaddr);
+
+ physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
+ if (mr != &io_mem_ram && mr != &io_mem_rom
+ && mr != &io_mem_unassigned
+ && mr != &io_mem_notdirty
+ && !can_do_io(env)) {
+ cpu_io_recompile(env, retaddr);
+ }
+
+ env->mem_io_vaddr = addr;
+ env->mem_io_pc = retaddr;
+#if SHIFT <= 2
+ io_mem_write(mr, physaddr, val, 1 << SHIFT);
+#else
+#ifdef TARGET_WORDS_BIGENDIAN
+ io_mem_write(mr, physaddr, (val >> 32), 4);
+ io_mem_write(mr, physaddr + 4, (uint32_t)val, 4);
+#else
+ io_mem_write(mr, physaddr, (uint32_t)val, 4);
+ io_mem_write(mr, physaddr + 4, val >> 32, 4);
+#endif
+#endif /* SHIFT > 2 */
+}
+
+void glue(glue(helper_st, SUFFIX), MMUSUFFIX)(CPUArchState *env,
+ target_ulong addr, DATA_TYPE val,
+ int mmu_idx)
+{
+ hwaddr ioaddr;
+ target_ulong tlb_addr;
+ uintptr_t retaddr;
+ int index;
+
+ index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+ redo:
+ tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
+ if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
+ if (tlb_addr & ~TARGET_PAGE_MASK) {
+ /* IO access */
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ goto do_unaligned_access;
+ retaddr = GETPC_EXT();
+ ioaddr = env->iotlb[mmu_idx][index];
+ glue(io_write, SUFFIX)(env, ioaddr, val, addr, retaddr);
+ } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
+ do_unaligned_access:
+ retaddr = GETPC_EXT();
+#ifdef ALIGNED_ONLY
+ do_unaligned_access(env, addr, 1, mmu_idx, retaddr);
+#endif
+ glue(glue(slow_st, SUFFIX), MMUSUFFIX)(env, addr, val,
+ mmu_idx, retaddr);
+ } else {
+ /* aligned/unaligned access in the same page */
+ uintptr_t addend;
+#ifdef ALIGNED_ONLY
+ if ((addr & (DATA_SIZE - 1)) != 0) {
+ retaddr = GETPC_EXT();
+ do_unaligned_access(env, addr, 1, mmu_idx, retaddr);
+ }
+#endif
+ addend = env->tlb_table[mmu_idx][index].addend;
+ glue(glue(st, SUFFIX), _raw)((uint8_t *)(intptr_t)
+ (addr + addend), val);
+ }
+ } else {
+ /* the page is not in the TLB : fill it */
+ retaddr = GETPC_EXT();
+#ifdef ALIGNED_ONLY
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ do_unaligned_access(env, addr, 1, mmu_idx, retaddr);
+#endif
+ tlb_fill(env, addr, 1, mmu_idx, retaddr);
+ goto redo;
+ }
+}
+
+/* handles all unaligned cases */
+static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(CPUArchState *env,
+ target_ulong addr,
+ DATA_TYPE val,
+ int mmu_idx,
+ uintptr_t retaddr)
+{
+ hwaddr ioaddr;
+ target_ulong tlb_addr;
+ int index, i;
+
+ index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+ redo:
+ tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
+ if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
+ if (tlb_addr & ~TARGET_PAGE_MASK) {
+ /* IO access */
+ if ((addr & (DATA_SIZE - 1)) != 0)
+ goto do_unaligned_access;
+ ioaddr = env->iotlb[mmu_idx][index];
+ glue(io_write, SUFFIX)(env, ioaddr, val, addr, retaddr);
+ } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
+ do_unaligned_access:
+ /* XXX: not efficient, but simple */
+ /* Note: relies on the fact that tlb_fill() does not remove the
+ * previous page from the TLB cache. */
+ for(i = DATA_SIZE - 1; i >= 0; i--) {
+#ifdef TARGET_WORDS_BIGENDIAN
+ glue(slow_stb, MMUSUFFIX)(env, addr + i,
+ val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
+ mmu_idx, retaddr);
+#else
+ glue(slow_stb, MMUSUFFIX)(env, addr + i,
+ val >> (i * 8),
+ mmu_idx, retaddr);
+#endif
+ }
+ } else {
+ /* aligned/unaligned access in the same page */
+ uintptr_t addend = env->tlb_table[mmu_idx][index].addend;
+ glue(glue(st, SUFFIX), _raw)((uint8_t *)(intptr_t)
+ (addr + addend), val);
+ }
+ } else {
+ /* the page is not in the TLB : fill it */
+ tlb_fill(env, addr, 1, mmu_idx, retaddr);
+ goto redo;
+ }
+}
+
+#endif /* !defined(SOFTMMU_CODE_ACCESS) */
+
+#undef READ_ACCESS_TYPE
+#undef SHIFT
+#undef DATA_TYPE
+#undef SUFFIX
+#undef USUFFIX
+#undef DATA_SIZE
+#undef ADDR_READ
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-21 13:08:05 +0000