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ppcmmu: add MMU profiling (disabled by default).
This commit is contained in:
Maxim Poliakovski
parent
bc59bf7c43
commit
085877a8bf
@ -25,7 +25,6 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
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- implement TLB
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- implement 601-style BATs
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- add proper error and exception handling
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- clarify what to do in the case of unaligned memory accesses
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*/
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#include "ppcmmu.h"
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@ -47,6 +46,95 @@ void (*mmu_exception_handler)(Except_Type exception_type, uint32_t srr1_bits);
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PPC_BAT_entry ibat_array[4] = {{0}};
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PPC_BAT_entry dbat_array[4] = {{0}};
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//#define MMU_PROFILING // enable MMU profiling
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/* MMU profiling */
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#ifdef MMU_PROFILING
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/* global variables for lightweight MMU profiling */
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uint32_t dmem_reads_total = 0; // counts reads from data memory
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uint32_t iomem_reads_total = 0; // counts I/O memory reads
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uint32_t dmem_writes_total = 0; // counts writes to data memory
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uint32_t iomem_writes_total = 0; // counts I/O memory writes
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uint32_t exec_reads_total = 0; // counts reads from executable memory
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uint32_t bat_transl_total = 0; // counts BAT translations
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uint32_t ptab_transl_total = 0; // counts page table translations
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uint32_t unaligned_reads = 0; // counts unaligned reads
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uint32_t unaligned_writes = 0; // counts unaligned writes
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uint32_t unaligned_crossp_r = 0; // counts unaligned crosspage reads
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uint32_t unaligned_crossp_w = 0; // counts unaligned crosspage writes
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#include "utils/profiler.h"
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#include <memory>
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class MMUProfile : public BaseProfile {
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public:
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MMUProfile() : BaseProfile("PPC_MMU") {};
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void populate_variables(std::vector<ProfileVar>& vars) {
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vars.clear();
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vars.push_back({.name = "Data Memory Reads Total",
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.format = ProfileVarFmt::DEC,
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.value = dmem_reads_total});
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vars.push_back({.name = "I/O Memory Reads Total",
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.format = ProfileVarFmt::DEC,
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.value = iomem_reads_total});
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vars.push_back({.name = "Data Memory Writes Total",
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.format = ProfileVarFmt::DEC,
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.value = dmem_writes_total});
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vars.push_back({.name = "I/O Memory Writes Total",
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.format = ProfileVarFmt::DEC,
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.value = iomem_writes_total});
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vars.push_back({.name = "Reads from Executable Memory",
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.format = ProfileVarFmt::DEC,
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.value = exec_reads_total});
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vars.push_back({.name = "BAT Translations Total",
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.format = ProfileVarFmt::DEC,
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.value = bat_transl_total});
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vars.push_back({.name = "Page Table Translations Total",
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.format = ProfileVarFmt::DEC,
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.value = ptab_transl_total});
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vars.push_back({.name = "Unaligned Reads Total",
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.format = ProfileVarFmt::DEC,
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.value = unaligned_reads});
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vars.push_back({.name = "Unaligned Writes Total",
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.format = ProfileVarFmt::DEC,
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.value = unaligned_writes});
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vars.push_back({.name = "Unaligned Crosspage Reads Total",
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.format = ProfileVarFmt::DEC,
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.value = unaligned_crossp_r});
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vars.push_back({.name = "Unaligned Crosspage Writes Total",
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.format = ProfileVarFmt::DEC,
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.value = unaligned_crossp_w});
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};
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void reset() {
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dmem_reads_total = 0;
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iomem_reads_total = 0;
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dmem_writes_total = 0;
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iomem_writes_total = 0;
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exec_reads_total = 0;
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bat_transl_total = 0;
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ptab_transl_total = 0;
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unaligned_reads = 0;
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unaligned_writes = 0;
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unaligned_crossp_r = 0;
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unaligned_crossp_w = 0;
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};
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};
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#endif
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/** remember recently used physical memory regions for quicker translation. */
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AddressMapEntry last_read_area = {0xFFFFFFFF, 0xFFFFFFFF};
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AddressMapEntry last_write_area = {0xFFFFFFFF, 0xFFFFFFFF};
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@ -367,6 +455,10 @@ static uint32_t ppc_mmu_instr_translate(uint32_t la) {
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if ((bat_entry->access & access_bits) && ((la & bat_entry->hi_mask) == bat_entry->bepi)) {
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bat_hit = true;
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#ifdef MMU_PROFILING
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bat_transl_total++;
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#endif
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if (!bat_entry->prot) {
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mmu_exception_handler(Except_Type::EXC_ISI, 0x08000000);
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}
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@ -380,6 +472,10 @@ static uint32_t ppc_mmu_instr_translate(uint32_t la) {
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/* page address translation */
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if (!bat_hit) {
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pa = page_address_translate(la, true, msr_pr, 0);
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#ifdef MMU_PROFILING
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ptab_transl_total++;
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#endif
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}
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return pa;
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@ -407,6 +503,10 @@ static uint32_t ppc_mmu_addr_translate(uint32_t la, int is_write) {
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if ((bat_entry->access & access_bits) && ((la & bat_entry->hi_mask) == bat_entry->bepi)) {
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bat_hit = true;
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#ifdef MMU_PROFILING
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bat_transl_total++;
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#endif
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if (!bat_entry->prot || ((bat_entry->prot & 1) && is_write)) {
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ppc_state.spr[SPR::DSISR] = 0x08000000 | (is_write << 25);
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ppc_state.spr[SPR::DAR] = la;
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@ -422,6 +522,10 @@ static uint32_t ppc_mmu_addr_translate(uint32_t la, int is_write) {
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/* page address translation */
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if (!bat_hit) {
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pa = page_address_translate(la, false, msr_pr, is_write);
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#ifdef MMU_PROFILING
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ptab_transl_total++;
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#endif
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}
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return pa;
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@ -434,8 +538,9 @@ static void mem_write_unaligned(uint32_t addr, uint32_t value, uint32_t size) {
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if (((addr & 0xFFF) + size) > 0x1000) {
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// Special case: unaligned cross-page writes
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LOG_F(WARNING, "Cross-page unaligned write, addr=%08X, size=%d\n",
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addr, size);
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#ifdef MMU_PROFILING
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unaligned_crossp_w++;
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#endif
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uint32_t phys_addr;
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uint32_t shift = (size - 1) * 8;
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@ -463,6 +568,10 @@ static void mem_write_unaligned(uint32_t addr, uint32_t value, uint32_t size) {
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} else {
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write_phys_mem<uint32_t, false>(&last_write_area, addr, value);
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}
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#ifdef MMU_PROFILING
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unaligned_writes++;
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#endif
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}
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}
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@ -526,8 +635,9 @@ static uint32_t mem_grab_unaligned(uint32_t addr, uint32_t size) {
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if (((addr & 0xFFF) + size) > 0x1000) {
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// Special case: misaligned cross-page reads
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LOG_F(WARNING, "Cross-page unaligned read, addr=%08X, size=%d\n",
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addr, size);
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#ifdef MMU_PROFILING
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unaligned_crossp_r++;
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#endif
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uint32_t phys_addr;
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uint32_t res = 0;
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@ -541,7 +651,8 @@ static uint32_t mem_grab_unaligned(uint32_t addr, uint32_t size) {
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phys_addr = ppc_mmu_addr_translate(addr, 0);
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}
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res = (res << 8) | read_phys_mem<uint8_t, false>(&last_read_area, phys_addr);
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res = (res << 8) |
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read_phys_mem<uint8_t, false>(&last_read_area, phys_addr);
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}
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return res;
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@ -556,6 +667,10 @@ static uint32_t mem_grab_unaligned(uint32_t addr, uint32_t size) {
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} else {
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return read_phys_mem<uint32_t, false>(&last_read_area, addr);
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}
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#ifdef MMU_PROFILING
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unaligned_reads++;
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#endif
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}
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return ret;
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@ -614,6 +729,10 @@ uint64_t mem_grab_qword(uint32_t addr) {
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uint8_t* quickinstruction_translate(uint32_t addr) {
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uint8_t* real_addr;
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#ifdef MMU_PROFILING
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exec_reads_total++;
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#endif
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/* perform instruction address translation if enabled */
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if (ppc_state.msr & 0x20) {
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addr = ppc_mmu_instr_translate(addr);
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@ -685,4 +804,9 @@ uint64_t mem_read_dbg(uint32_t virt_addr, uint32_t size) {
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void ppc_mmu_init() {
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mmu_exception_handler = ppc_exception_handler;
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#ifdef MMU_PROFILING
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gProfilerObj->register_profile("PPC_MMU",
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std::unique_ptr<BaseProfile>(new MMUProfile()));
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#endif
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}
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