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CPU boot mode 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3231 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2007-09-24 19:44:09 +00:00
parent 9437454a84
commit 40ce0a9a8f
6 changed files with 21 additions and 10 deletions
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5
cpu-exec.c
View File

@ -181,8 +181,9 @@ static inline TranslationBlock *tb_find_fast(void)
flags = (((env->pstate & PS_PEF) >> 1) | ((env->fprs & FPRS_FEF) << 2))
| (env->pstate & PS_PRIV) | ((env->lsu & (DMMU_E | IMMU_E)) >> 2);
#else
// FPU enable . MMU enabled . MMU no-fault . Supervisor
flags = (env->psref << 3) | ((env->mmuregs[0] & (MMU_E | MMU_NF)) << 1)
// FPU enable . MMU Boot . MMU enabled . MMU no-fault . Supervisor
flags = (env->psref << 4) | (((env->mmuregs[0] & MMU_BM) >> 14) << 3)
| ((env->mmuregs[0] & (MMU_E | MMU_NF)) << 1)
| env->psrs;
#endif
cs_base = env->npc;

9
hw/sun4m.c
View File

@ -50,7 +50,8 @@
#define CMDLINE_ADDR 0x007ff000
#define INITRD_LOAD_ADDR 0x00800000
#define PROM_SIZE_MAX (256 * 1024)
#define PROM_ADDR 0xffd00000
#define PROM_PADDR 0xff0000000ULL
#define PROM_VADDR 0xffd00000
#define PROM_FILENAME "openbios-sparc32"
#define MAX_CPUS 16
@ -425,12 +426,12 @@ static void sun4m_load_kernel(long vram_size, int RAM_size, int boot_device,
linux_boot = (kernel_filename != NULL);
prom_offset = RAM_size + vram_size;
cpu_register_physical_memory(PROM_ADDR,
cpu_register_physical_memory(PROM_PADDR,
(PROM_SIZE_MAX + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK,
prom_offset | IO_MEM_ROM);
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, PROM_FILENAME);
ret = load_elf(buf, 0, NULL, NULL, NULL);
ret = load_elf(buf, PROM_PADDR - PROM_VADDR, NULL, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "qemu: could not load prom '%s'\n",
buf);
@ -588,7 +589,7 @@ static void ss10_init(int RAM_size, int vga_ram_size, int boot_device,
cpu_model = "TI SuperSparc II";
sun4m_common_init(RAM_size, boot_device, ds, kernel_filename,
kernel_cmdline, initrd_filename, cpu_model,
1, PROM_ADDR); // XXX prom overlap, actually first 4GB ok
1, 0xffffffff); // XXX actually first 62GB ok
}
QEMUMachine ss5_machine = {

1
target-sparc/cpu.h
View File

@ -145,6 +145,7 @@
/* MMU */
#define MMU_E (1<<0)
#define MMU_NF (1<<1)
#define MMU_BM (1<<14)
#define PTE_ENTRYTYPE_MASK 3
#define PTE_ACCESS_MASK 0x1c

7
target-sparc/helper.c
View File

@ -110,7 +110,14 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot
unsigned long page_offset;
virt_addr = address & TARGET_PAGE_MASK;
if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
// Boot mode: instruction fetches are taken from PROM
if (rw == 2 && (env->mmuregs[0] & MMU_BM)) {
*physical = 0xff0000000ULL | (address & 0x3ffffULL);
*prot = PAGE_READ | PAGE_EXEC;
return 0;
}
*physical = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return 0;

4
target-sparc/op_helper.c
View File

@ -337,8 +337,8 @@ void helper_st_asi(int asi, int size)
oldreg = env->mmuregs[reg];
switch(reg) {
case 0:
env->mmuregs[reg] &= ~(MMU_E | MMU_NF);
env->mmuregs[reg] |= T1 & (MMU_E | MMU_NF);
env->mmuregs[reg] &= ~(MMU_E | MMU_NF | MMU_BM);
env->mmuregs[reg] |= T1 & (MMU_E | MMU_NF | MMU_BM);
// Mappings generated during no-fault mode or MMU
// disabled mode are invalid in normal mode
if (oldreg != env->mmuregs[reg])

5
target-sparc/translate.c
View File

@ -3486,8 +3486,9 @@ void cpu_reset(CPUSPARCState *env)
env->pstate = PS_PRIV;
env->pc = 0x1fff0000000ULL;
#else
env->pc = 0xffd00000;
env->pc = 0;
env->mmuregs[0] &= ~(MMU_E | MMU_NF);
env->mmuregs[0] |= MMU_BM;
#endif
env->npc = env->pc + 4;
#endif
@ -3584,7 +3585,7 @@ int cpu_sparc_register (CPUSPARCState *env, const sparc_def_t *def)
env->version = def->iu_version;
env->fsr = def->fpu_version;
#if !defined(TARGET_SPARC64)
env->mmuregs[0] = def->mmu_version;
env->mmuregs[0] |= def->mmu_version;
#endif
return 0;
}