* 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>
-#include <assert.h>
#include "cpu.h"
-#include "exec-all.h"
#include "hw/sh_intc.h"
#if defined(CONFIG_USER_ONLY)
int mmu_idx, int is_softmmu)
{
env->tea = address;
- env->exception_index = 0;
+ env->exception_index = -1;
switch (rw) {
case 0:
env->exception_index = 0x0a0;
return 1;
}
-target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
+int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
{
- return addr;
+ /* For user mode, only U0 area is cachable. */
+ return !(addr & 0x80000000);
}
#else /* !CONFIG_USER_ONLY */
if (do_exp && env->exception_index != 0x1e0) {
env->exception_index = 0x000; /* masked exception -> reset */
}
- if (do_irq && !env->intr_at_halt) {
+ if (do_irq && !env->in_sleep) {
return; /* masked */
}
- env->intr_at_halt = 0;
}
+ env->in_sleep = 0;
if (do_irq) {
irq_vector = sh_intc_get_pending_vector(env->intc_handle,
return 2;
if ((env->mmucr & 0x2c000000) == 0x00000000)
return 3;
- assert(0);
+ cpu_abort(env, "Unhandled itlb_replacement");
}
/* Find the corresponding entry in the right TLB
continue; /* Invalid entry */
if (!entries[i].sh && use_asid && entries[i].asid != asid)
continue; /* Bad ASID */
-#if 0
- switch (entries[i].sz) {
- case 0:
- size = 1024; /* 1kB */
- break;
- case 1:
- size = 4 * 1024; /* 4kB */
- break;
- case 2:
- size = 64 * 1024; /* 64kB */
- break;
- case 3:
- size = 1024 * 1024; /* 1MB */
- break;
- default:
- assert(0);
- }
-#endif
start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
end = start + entries[i].size - 1;
if (address >= start && address <= end) { /* Match */
return match;
}
-static int same_tlb_entry_exists(const tlb_t * haystack, uint8_t nbtlb,
- const tlb_t * needle)
-{
- int i;
- for (i = 0; i < nbtlb; i++)
- if (!memcmp(&haystack[i], needle, sizeof(tlb_t)))
- return 1;
- return 0;
-}
-
static void increment_urc(CPUState * env)
{
uint8_t urb, urc;
urb = ((env->mmucr) >> 18) & 0x3f;
urc = ((env->mmucr) >> 10) & 0x3f;
urc++;
- if (urc == urb || urc == UTLB_SIZE)
+ if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
urc = 0;
env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
}
-/* Find itlb entry - update itlb from utlb if necessary and asked for
+/* Copy and utlb entry into itlb
+ Return entry
+*/
+static int copy_utlb_entry_itlb(CPUState *env, int utlb)
+{
+ int itlb;
+
+ tlb_t * ientry;
+ itlb = itlb_replacement(env);
+ ientry = &env->itlb[itlb];
+ if (ientry->v) {
+ tlb_flush_page(env, ientry->vpn << 10);
+ }
+ *ientry = env->utlb[utlb];
+ update_itlb_use(env, itlb);
+ return itlb;
+}
+
+/* Find itlb entry
Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
- Update the itlb from utlb if update is not 0
*/
static int find_itlb_entry(CPUState * env, target_ulong address,
- int use_asid, int update)
+ int use_asid)
{
- int e, n;
+ int e;
e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
- if (e == MMU_DTLB_MULTIPLE)
+ if (e == MMU_DTLB_MULTIPLE) {
e = MMU_ITLB_MULTIPLE;
- else if (e == MMU_DTLB_MISS && update) {
- e = find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
- if (e >= 0) {
- tlb_t * ientry;
- n = itlb_replacement(env);
- ientry = &env->itlb[n];
- if (ientry->v) {
- if (!same_tlb_entry_exists(env->utlb, UTLB_SIZE, ientry))
- tlb_flush_page(env, ientry->vpn << 10);
- }
- *ientry = env->utlb[e];
- e = n;
- } else if (e == MMU_DTLB_MISS)
- e = MMU_ITLB_MISS;
- } else if (e == MMU_DTLB_MISS)
+ } else if (e == MMU_DTLB_MISS) {
e = MMU_ITLB_MISS;
- if (e >= 0)
+ } else if (e >= 0) {
update_itlb_use(env, e);
+ }
return e;
}
use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
if (rw == 2) {
- n = find_itlb_entry(env, address, use_asid, 1);
+ n = find_itlb_entry(env, address, use_asid);
if (n >= 0) {
matching = &env->itlb[n];
- if ((env->sr & SR_MD) & !(matching->pr & 2))
+ if (!(env->sr & SR_MD) && !(matching->pr & 2))
n = MMU_ITLB_VIOLATION;
else
- *prot = PAGE_READ;
+ *prot = PAGE_EXEC;
+ } else {
+ n = find_utlb_entry(env, address, use_asid);
+ if (n >= 0) {
+ n = copy_utlb_entry_itlb(env, n);
+ matching = &env->itlb[n];
+ if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
+ n = MMU_ITLB_VIOLATION;
+ } else {
+ *prot = PAGE_READ | PAGE_EXEC;
+ if ((matching->pr & 1) && matching->d) {
+ *prot |= PAGE_WRITE;
+ }
+ }
+ } else if (n == MMU_DTLB_MULTIPLE) {
+ n = MMU_ITLB_MULTIPLE;
+ } else if (n == MMU_DTLB_MISS) {
+ n = MMU_ITLB_MISS;
+ }
}
} else {
n = find_utlb_entry(env, address, use_asid);
if (n >= 0) {
matching = &env->utlb[n];
- switch ((matching->pr << 1) | ((env->sr & SR_MD) ? 1 : 0)) {
- case 0: /* 000 */
- case 2: /* 010 */
- n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
- MMU_DTLB_VIOLATION_READ;
- break;
- case 1: /* 001 */
- case 4: /* 100 */
- case 5: /* 101 */
- if (rw == 1)
- n = MMU_DTLB_VIOLATION_WRITE;
- else
- *prot = PAGE_READ;
- break;
- case 3: /* 011 */
- case 6: /* 110 */
- case 7: /* 111 */
- *prot = (rw == 1)? PAGE_WRITE : PAGE_READ;
- break;
- }
+ if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
+ n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
+ MMU_DTLB_VIOLATION_READ;
+ } else if ((rw == 1) && !(matching->pr & 1)) {
+ n = MMU_DTLB_VIOLATION_WRITE;
+ } else if ((rw == 1) && !matching->d) {
+ n = MMU_DTLB_INITIAL_WRITE;
+ } else {
+ *prot = PAGE_READ;
+ if ((matching->pr & 1) && matching->d) {
+ *prot |= PAGE_WRITE;
+ }
+ }
} else if (n == MMU_DTLB_MISS) {
n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
MMU_DTLB_MISS_READ;
}
}
if (n >= 0) {
+ n = MMU_OK;
*physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
(address & (matching->size - 1));
- if ((rw == 1) & !matching->d)
- n = MMU_DTLB_INITIAL_WRITE;
- else
- n = MMU_OK;
}
return n;
}
if ((address >= 0x80000000 && address < 0xc0000000) ||
address >= 0xe0000000) {
if (!(env->sr & SR_MD)
- && (address < 0xe0000000 || address > 0xe4000000)) {
+ && (address < 0xe0000000 || address >= 0xe4000000)) {
/* Unauthorized access in user mode (only store queues are available) */
fprintf(stderr, "Unauthorized access\n");
if (rw == 0)
} else {
*physical = address;
}
- *prot = PAGE_READ | PAGE_WRITE;
+ *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return MMU_OK;
}
/* If MMU is disabled, return the corresponding physical page */
- if (!env->mmucr & MMUCR_AT) {
+ if (!(env->mmucr & MMUCR_AT)) {
*physical = address & 0x1FFFFFFF;
- *prot = PAGE_READ | PAGE_WRITE;
+ *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return MMU_OK;
}
int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
- target_ulong physical, page_offset, page_size;
+ target_ulong physical;
int prot, ret, access_type;
access_type = ACCESS_INT;
if (ret != MMU_OK) {
env->tea = address;
+ if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
+ env->pteh = (env->pteh & PTEH_ASID_MASK) |
+ (address & PTEH_VPN_MASK);
+ }
switch (ret) {
case MMU_ITLB_MISS:
case MMU_DTLB_MISS_READ:
break;
case MMU_IADDR_ERROR:
case MMU_DADDR_ERROR_READ:
- env->exception_index = 0x0c0;
+ env->exception_index = 0x0e0;
break;
case MMU_DADDR_ERROR_WRITE:
env->exception_index = 0x100;
break;
default:
- assert(0);
+ cpu_abort(env, "Unhandled MMU fault");
}
return 1;
}
- page_size = TARGET_PAGE_SIZE;
- page_offset =
- (address - (address & TARGET_PAGE_MASK)) & ~(page_size - 1);
- address = (address & TARGET_PAGE_MASK) + page_offset;
- physical = (physical & TARGET_PAGE_MASK) + page_offset;
+ address &= TARGET_PAGE_MASK;
+ physical &= TARGET_PAGE_MASK;
- return tlb_set_page(env, address, physical, prot, mmu_idx, is_softmmu);
+ tlb_set_page(env, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
+ return 0;
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
if (entry->v) {
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
- if (!same_tlb_entry_exists(env->itlb, ITLB_SIZE, entry)) {
- tlb_flush_page(env, address);
- }
+ tlb_flush_page(env, address);
}
/* Take values into cpu status from registers. */
entry->size = 1024 * 1024; /* 1M */
break;
default:
- assert(0);
+ cpu_abort(env, "Unhandled load_tlb");
break;
}
entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
}
+ void cpu_sh4_invalidate_tlb(CPUSH4State *s)
+{
+ int i;
+
+ /* UTLB */
+ for (i = 0; i < UTLB_SIZE; i++) {
+ tlb_t * entry = &s->utlb[i];
+ entry->v = 0;
+ }
+ /* ITLB */
+ for (i = 0; i < ITLB_SIZE; i++) {
+ tlb_t * entry = &s->itlb[i];
+ entry->v = 0;
+ }
+
+ tlb_flush(s, 1);
+}
+
+uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
+ target_phys_addr_t addr)
+{
+ int index = (addr & 0x00000300) >> 8;
+ tlb_t * entry = &s->itlb[index];
+
+ return (entry->vpn << 10) |
+ (entry->v << 8) |
+ (entry->asid);
+}
+
+void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, target_phys_addr_t addr,
+ uint32_t mem_value)
+{
+ uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
+ uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
+ uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
+
+ int index = (addr & 0x00000300) >> 8;
+ tlb_t * entry = &s->itlb[index];
+ if (entry->v) {
+ /* Overwriting valid entry in itlb. */
+ target_ulong address = entry->vpn << 10;
+ tlb_flush_page(s, address);
+ }
+ entry->asid = asid;
+ entry->vpn = vpn;
+ entry->v = v;
+}
+
+uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
+ target_phys_addr_t addr)
+{
+ int array = (addr & 0x00800000) >> 23;
+ int index = (addr & 0x00000300) >> 8;
+ tlb_t * entry = &s->itlb[index];
+
+ if (array == 0) {
+ /* ITLB Data Array 1 */
+ return (entry->ppn << 10) |
+ (entry->v << 8) |
+ (entry->pr << 5) |
+ ((entry->sz & 1) << 6) |
+ ((entry->sz & 2) << 4) |
+ (entry->c << 3) |
+ (entry->sh << 1);
+ } else {
+ /* ITLB Data Array 2 */
+ return (entry->tc << 1) |
+ (entry->sa);
+ }
+}
+
+void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, target_phys_addr_t addr,
+ uint32_t mem_value)
+{
+ int array = (addr & 0x00800000) >> 23;
+ int index = (addr & 0x00000300) >> 8;
+ tlb_t * entry = &s->itlb[index];
+
+ if (array == 0) {
+ /* ITLB Data Array 1 */
+ if (entry->v) {
+ /* Overwriting valid entry in utlb. */
+ target_ulong address = entry->vpn << 10;
+ tlb_flush_page(s, address);
+ }
+ entry->ppn = (mem_value & 0x1ffffc00) >> 10;
+ entry->v = (mem_value & 0x00000100) >> 8;
+ entry->sz = (mem_value & 0x00000080) >> 6 |
+ (mem_value & 0x00000010) >> 4;
+ entry->pr = (mem_value & 0x00000040) >> 5;
+ entry->c = (mem_value & 0x00000008) >> 3;
+ entry->sh = (mem_value & 0x00000002) >> 1;
+ } else {
+ /* ITLB Data Array 2 */
+ entry->tc = (mem_value & 0x00000008) >> 3;
+ entry->sa = (mem_value & 0x00000007);
+ }
+}
+
+uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
+ target_phys_addr_t addr)
+{
+ int index = (addr & 0x00003f00) >> 8;
+ tlb_t * entry = &s->utlb[index];
+
+ increment_urc(s); /* per utlb access */
+
+ return (entry->vpn << 10) |
+ (entry->v << 8) |
+ (entry->asid);
+}
+
void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
uint32_t mem_value)
{
if (entry->v) {
/* Overwriting valid entry in utlb. */
target_ulong address = entry->vpn << 10;
- if (!same_tlb_entry_exists(s->itlb, ITLB_SIZE, entry)) {
- tlb_flush_page(s, address);
- }
+ tlb_flush_page(s, address);
}
entry->asid = asid;
entry->vpn = vpn;
}
}
+uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
+ target_phys_addr_t addr)
+{
+ int array = (addr & 0x00800000) >> 23;
+ int index = (addr & 0x00003f00) >> 8;
+ tlb_t * entry = &s->utlb[index];
+
+ increment_urc(s); /* per utlb access */
+
+ if (array == 0) {
+ /* ITLB Data Array 1 */
+ return (entry->ppn << 10) |
+ (entry->v << 8) |
+ (entry->pr << 5) |
+ ((entry->sz & 1) << 6) |
+ ((entry->sz & 2) << 4) |
+ (entry->c << 3) |
+ (entry->d << 2) |
+ (entry->sh << 1) |
+ (entry->wt);
+ } else {
+ /* ITLB Data Array 2 */
+ return (entry->tc << 1) |
+ (entry->sa);
+ }
+}
+
+void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, target_phys_addr_t addr,
+ uint32_t mem_value)
+{
+ int array = (addr & 0x00800000) >> 23;
+ int index = (addr & 0x00003f00) >> 8;
+ tlb_t * entry = &s->utlb[index];
+
+ increment_urc(s); /* per utlb access */
+
+ if (array == 0) {
+ /* UTLB Data Array 1 */
+ if (entry->v) {
+ /* Overwriting valid entry in utlb. */
+ target_ulong address = entry->vpn << 10;
+ tlb_flush_page(s, address);
+ }
+ entry->ppn = (mem_value & 0x1ffffc00) >> 10;
+ entry->v = (mem_value & 0x00000100) >> 8;
+ entry->sz = (mem_value & 0x00000080) >> 6 |
+ (mem_value & 0x00000010) >> 4;
+ entry->pr = (mem_value & 0x00000060) >> 5;
+ entry->c = (mem_value & 0x00000008) >> 3;
+ entry->d = (mem_value & 0x00000004) >> 2;
+ entry->sh = (mem_value & 0x00000002) >> 1;
+ entry->wt = (mem_value & 0x00000001);
+ } else {
+ /* UTLB Data Array 2 */
+ entry->tc = (mem_value & 0x00000008) >> 3;
+ entry->sa = (mem_value & 0x00000007);
+ }
+}
+
+int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
+{
+ int n;
+ int use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
+
+ /* check area */
+ if (env->sr & SR_MD) {
+ /* For previledged mode, P2 and P4 area is not cachable. */
+ if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
+ return 0;
+ } else {
+ /* For user mode, only U0 area is cachable. */
+ if (0x80000000 <= addr)
+ return 0;
+ }
+
+ /*
+ * TODO : Evaluate CCR and check if the cache is on or off.
+ * Now CCR is not in CPUSH4State, but in SH7750State.
+ * When you move the ccr inot CPUSH4State, the code will be
+ * as follows.
+ */
+#if 0
+ /* check if operand cache is enabled or not. */
+ if (!(env->ccr & 1))
+ return 0;
+#endif
+
+ /* if MMU is off, no check for TLB. */
+ if (env->mmucr & MMUCR_AT)
+ return 1;
+
+ /* check TLB */
+ n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
+ if (n >= 0)
+ return env->itlb[n].c;
+
+ n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
+ if (n >= 0)
+ return env->utlb[n].c;
+
+ return 0;
+}
+
#endif
projects / qemu.git / blobdiff