cputlb: move TLB handling to a separate file
Move TLB handling and softmmu code load helpers to cputlb.c,
compile only for softmmu targets.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/exec.c b/exec.c
index d93a14d..e4bf6d7 100644
--- a/exec.c
+++ b/exec.c
@@ -57,17 +57,17 @@
#include "trace.h"
#endif
+#include "cputlb.h"
+
#define WANT_EXEC_OBSOLETE
#include "exec-obsolete.h"
//#define DEBUG_TB_INVALIDATE
//#define DEBUG_FLUSH
-//#define DEBUG_TLB
//#define DEBUG_UNASSIGNED
/* make various TB consistency checks */
//#define DEBUG_TB_CHECK
-//#define DEBUG_TLB_CHECK
//#define DEBUG_IOPORT
//#define DEBUG_SUBPAGE
@@ -227,9 +227,6 @@
static int log_append = 0;
/* statistics */
-#if !defined(CONFIG_USER_ONLY)
-static int tlb_flush_count;
-#endif
static int tb_flush_count;
static int tb_phys_invalidate_count;
@@ -479,7 +476,7 @@
phys_page_set_level(&phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
}
-static MemoryRegionSection *phys_page_find(target_phys_addr_t index)
+MemoryRegionSection *phys_page_find(target_phys_addr_t index)
{
PhysPageEntry lp = phys_map;
PhysPageEntry *p;
@@ -499,7 +496,6 @@
return &phys_sections[s_index];
}
-static
bool memory_region_is_unassigned(MemoryRegion *mr)
{
return mr != &io_mem_ram && mr != &io_mem_rom
@@ -507,17 +503,14 @@
&& mr != &io_mem_watch;
}
-static target_phys_addr_t section_addr(MemoryRegionSection *section,
- target_phys_addr_t addr)
+target_phys_addr_t section_addr(MemoryRegionSection *section,
+ target_phys_addr_t addr)
{
addr -= section->offset_within_address_space;
addr += section->offset_within_region;
return addr;
}
-static void tlb_protect_code(ram_addr_t ram_addr);
-static void tlb_unprotect_code_phys(CPUArchState *env, ram_addr_t ram_addr,
- target_ulong vaddr);
#define mmap_lock() do { } while(0)
#define mmap_unlock() do { } while(0)
#endif
@@ -1926,8 +1919,7 @@
}
#if !defined(CONFIG_USER_ONLY)
-
-static inline void tb_flush_jmp_cache(CPUArchState *env, target_ulong addr)
+void tb_flush_jmp_cache(CPUArchState *env, target_ulong addr)
{
unsigned int i;
@@ -1942,147 +1934,6 @@
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
}
-static const CPUTLBEntry s_cputlb_empty_entry = {
- .addr_read = -1,
- .addr_write = -1,
- .addr_code = -1,
- .addend = -1,
-};
-
-/* NOTE:
- * If flush_global is true (the usual case), flush all tlb entries.
- * If flush_global is false, flush (at least) all tlb entries not
- * marked global.
- *
- * Since QEMU doesn't currently implement a global/not-global flag
- * for tlb entries, at the moment tlb_flush() will also flush all
- * tlb entries in the flush_global == false case. This is OK because
- * CPU architectures generally permit an implementation to drop
- * entries from the TLB at any time, so flushing more entries than
- * required is only an efficiency issue, not a correctness issue.
- */
-void tlb_flush(CPUArchState *env, int flush_global)
-{
- int i;
-
-#if defined(DEBUG_TLB)
- printf("tlb_flush:\n");
-#endif
- /* must reset current TB so that interrupts cannot modify the
- links while we are modifying them */
- env->current_tb = NULL;
-
- for (i = 0; i < CPU_TLB_SIZE; i++) {
- int mmu_idx;
-
- for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
- env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry;
- }
- }
-
- memset(env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *));
-
- env->tlb_flush_addr = -1;
- env->tlb_flush_mask = 0;
- tlb_flush_count++;
-}
-
-static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr)
-{
- if (addr == (tlb_entry->addr_read &
- (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
- addr == (tlb_entry->addr_write &
- (TARGET_PAGE_MASK | TLB_INVALID_MASK)) ||
- addr == (tlb_entry->addr_code &
- (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
- *tlb_entry = s_cputlb_empty_entry;
- }
-}
-
-void tlb_flush_page(CPUArchState *env, target_ulong addr)
-{
- int i;
- int mmu_idx;
-
-#if defined(DEBUG_TLB)
- printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr);
-#endif
- /* Check if we need to flush due to large pages. */
- if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) {
-#if defined(DEBUG_TLB)
- printf("tlb_flush_page: forced full flush ("
- TARGET_FMT_lx "/" TARGET_FMT_lx ")\n",
- env->tlb_flush_addr, env->tlb_flush_mask);
-#endif
- tlb_flush(env, 1);
- return;
- }
- /* must reset current TB so that interrupts cannot modify the
- links while we are modifying them */
- env->current_tb = NULL;
-
- addr &= TARGET_PAGE_MASK;
- i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
- for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
- tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr);
- }
-
- tb_flush_jmp_cache(env, addr);
-}
-
-/* update the TLBs so that writes to code in the virtual page 'addr'
- can be detected */
-static void tlb_protect_code(ram_addr_t ram_addr)
-{
- cpu_physical_memory_reset_dirty(ram_addr,
- ram_addr + TARGET_PAGE_SIZE,
- CODE_DIRTY_FLAG);
-}
-
-/* update the TLB so that writes in physical page 'phys_addr' are no longer
- tested for self modifying code */
-static void tlb_unprotect_code_phys(CPUArchState *env, ram_addr_t ram_addr,
- target_ulong vaddr)
-{
- cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG);
-}
-
-static bool tlb_is_dirty_ram(CPUTLBEntry *tlbe)
-{
- return (tlbe->addr_write & (TLB_INVALID_MASK|TLB_MMIO|TLB_NOTDIRTY)) == 0;
-}
-
-static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
- uintptr_t start, uintptr_t length)
-{
- uintptr_t addr;
-
- if (tlb_is_dirty_ram(tlb_entry)) {
- addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend;
- if ((addr - start) < length) {
- tlb_entry->addr_write |= TLB_NOTDIRTY;
- }
- }
-}
-
-static void cpu_tlb_reset_dirty_all(ram_addr_t start1, ram_addr_t length)
-{
- CPUArchState *env;
-
- for (env = first_cpu; env != NULL; env = env->next_cpu) {
- int mmu_idx;
-
- for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
- unsigned int i;
-
- for (i = 0; i < CPU_TLB_SIZE; i++) {
- tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i],
- start1, length);
- }
- }
- }
-}
-
/* Note: start and end must be within the same ram block. */
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
int dirty_flags)
@@ -2116,83 +1967,6 @@
return ret;
}
-static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
-{
- ram_addr_t ram_addr;
- void *p;
-
- if (tlb_is_dirty_ram(tlb_entry)) {
- p = (void *)(uintptr_t)((tlb_entry->addr_write & TARGET_PAGE_MASK)
- + tlb_entry->addend);
- ram_addr = qemu_ram_addr_from_host_nofail(p);
- if (!cpu_physical_memory_is_dirty(ram_addr)) {
- tlb_entry->addr_write |= TLB_NOTDIRTY;
- }
- }
-}
-
-static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr)
-{
- if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY)) {
- tlb_entry->addr_write = vaddr;
- }
-}
-
-/* update the TLB corresponding to virtual page vaddr
- so that it is no longer dirty */
-static inline void tlb_set_dirty(CPUArchState *env, target_ulong vaddr)
-{
- int i;
- int mmu_idx;
-
- vaddr &= TARGET_PAGE_MASK;
- i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
- for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
- tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr);
- }
-}
-
-/* Our TLB does not support large pages, so remember the area covered by
- large pages and trigger a full TLB flush if these are invalidated. */
-static void tlb_add_large_page(CPUArchState *env, target_ulong vaddr,
- target_ulong size)
-{
- target_ulong mask = ~(size - 1);
-
- if (env->tlb_flush_addr == (target_ulong)-1) {
- env->tlb_flush_addr = vaddr & mask;
- env->tlb_flush_mask = mask;
- return;
- }
- /* Extend the existing region to include the new page.
- This is a compromise between unnecessary flushes and the cost
- of maintaining a full variable size TLB. */
- mask &= env->tlb_flush_mask;
- while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) {
- mask <<= 1;
- }
- env->tlb_flush_addr &= mask;
- env->tlb_flush_mask = mask;
-}
-
-static bool is_ram_rom(MemoryRegionSection *s)
-{
- return memory_region_is_ram(s->mr);
-}
-
-static bool is_romd(MemoryRegionSection *s)
-{
- MemoryRegion *mr = s->mr;
-
- return mr->rom_device && mr->readable;
-}
-
-static bool is_ram_rom_romd(MemoryRegionSection *s)
-{
- return is_ram_rom(s) || is_romd(s);
-}
-
-static
target_phys_addr_t memory_region_section_get_iotlb(CPUArchState *env,
MemoryRegionSection *section,
target_ulong vaddr,
@@ -2239,91 +2013,7 @@
return iotlb;
}
-/* Add a new TLB entry. At most one entry for a given virtual address
- is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
- supplied size is only used by tlb_flush_page. */
-void tlb_set_page(CPUArchState *env, target_ulong vaddr,
- target_phys_addr_t paddr, int prot,
- int mmu_idx, target_ulong size)
-{
- MemoryRegionSection *section;
- unsigned int index;
- target_ulong address;
- target_ulong code_address;
- uintptr_t addend;
- CPUTLBEntry *te;
- target_phys_addr_t iotlb;
-
- assert(size >= TARGET_PAGE_SIZE);
- if (size != TARGET_PAGE_SIZE) {
- tlb_add_large_page(env, vaddr, size);
- }
- section = phys_page_find(paddr >> TARGET_PAGE_BITS);
-#if defined(DEBUG_TLB)
- printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx
- " prot=%x idx=%d pd=0x%08lx\n",
- vaddr, paddr, prot, mmu_idx, pd);
-#endif
-
- address = vaddr;
- if (!is_ram_rom_romd(section)) {
- /* IO memory case (romd handled later) */
- address |= TLB_MMIO;
- }
- if (is_ram_rom_romd(section)) {
- addend = (uintptr_t)memory_region_get_ram_ptr(section->mr)
- + section_addr(section, paddr);
- } else {
- addend = 0;
- }
- iotlb = memory_region_section_get_iotlb(env, section, vaddr, paddr, prot,
- &address);
-
- code_address = address;
-
- index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
- env->iotlb[mmu_idx][index] = iotlb - vaddr;
- te = &env->tlb_table[mmu_idx][index];
- te->addend = addend - vaddr;
- if (prot & PAGE_READ) {
- te->addr_read = address;
- } else {
- te->addr_read = -1;
- }
-
- if (prot & PAGE_EXEC) {
- te->addr_code = code_address;
- } else {
- te->addr_code = -1;
- }
- if (prot & PAGE_WRITE) {
- if ((memory_region_is_ram(section->mr) && section->readonly)
- || is_romd(section)) {
- /* Write access calls the I/O callback. */
- te->addr_write = address | TLB_MMIO;
- } else if (memory_region_is_ram(section->mr)
- && !cpu_physical_memory_is_dirty(
- section->mr->ram_addr
- + section_addr(section, paddr))) {
- te->addr_write = address | TLB_NOTDIRTY;
- } else {
- te->addr_write = address;
- }
- } else {
- te->addr_write = -1;
- }
-}
-
#else
-
-void tlb_flush(CPUArchState *env, int flush_global)
-{
-}
-
-void tlb_flush_page(CPUArchState *env, target_ulong addr)
-{
-}
-
/*
* Walks guest process memory "regions" one by one
* and calls callback function 'fn' for each region.
@@ -2580,11 +2270,6 @@
mmap_unlock();
return 0;
}
-
-static inline void tlb_set_dirty(CPUArchState *env,
- uintptr_t addr, target_ulong vaddr)
-{
-}
#endif /* defined(CONFIG_USER_ONLY) */
#if !defined(CONFIG_USER_ONLY)
@@ -4621,39 +4306,6 @@
tcg_dump_info(f, cpu_fprintf);
}
-/* NOTE: this function can trigger an exception */
-/* NOTE2: the returned address is not exactly the physical address: it
- is the offset relative to phys_ram_base */
-tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr)
-{
- int mmu_idx, page_index, pd;
- void *p;
- MemoryRegion *mr;
-
- page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
- mmu_idx = cpu_mmu_index(env1);
- if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
- (addr & TARGET_PAGE_MASK))) {
-#ifdef CONFIG_TCG_PASS_AREG0
- cpu_ldub_code(env1, addr);
-#else
- ldub_code(addr);
-#endif
- }
- pd = env1->iotlb[mmu_idx][page_index] & ~TARGET_PAGE_MASK;
- mr = iotlb_to_region(pd);
- if (memory_region_is_unassigned(mr)) {
-#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SPARC)
- cpu_unassigned_access(env1, addr, 0, 1, 0, 4);
-#else
- cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x"
- TARGET_FMT_lx "\n", addr);
-#endif
- }
- p = (void *)((uintptr_t)addr + env1->tlb_table[mmu_idx][page_index].addend);
- return qemu_ram_addr_from_host_nofail(p);
-}
-
/*
* A helper function for the _utterly broken_ virtio device model to find out if
* it's running on a big endian machine. Don't do this at home kids!
@@ -4668,24 +4320,4 @@
#endif
}
-#define MMUSUFFIX _cmmu
-#undef GETPC
-#define GETPC() ((uintptr_t)0)
-#define env cpu_single_env
-#define SOFTMMU_CODE_ACCESS
-
-#define SHIFT 0
-#include "softmmu_template.h"
-
-#define SHIFT 1
-#include "softmmu_template.h"
-
-#define SHIFT 2
-#include "softmmu_template.h"
-
-#define SHIFT 3
-#include "softmmu_template.h"
-
-#undef env
-
#endif
