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hw/ppc: Consolidate ppc440 initial mapping creation functions

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Add a utility function and use it to replace very similar
create_initial_mapping functions in 440 based machines.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
BALATON Zoltan 2024-07-16 14:07:58 +02:00 • committed by Nicholas Piggin
parent 779a30df98
commit afff880071
5 changed files with 28 additions and 85 deletions
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45
hw/ppc/sam460ex.c
View file

@ -213,38 +213,6 @@ static int sam460ex_load_device_tree(MachineState *machine,
return fdt_size;
}
/* Create reset TLB entries for BookE, mapping only the flash memory. */
static void mmubooke_create_initial_mapping_uboot(CPUPPCState *env)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
/* on reset the flash is mapped by a shadow TLB,
* but since we don't implement them we need to use
* the same values U-Boot will use to avoid a fault.
*/
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 0x10000000; /* up to 0xffffffff */
tlb->EPN = 0xf0000000 & TARGET_PAGE_MASK;
tlb->RPN = (0xf0000000 & TARGET_PAGE_MASK) | 0x4;
tlb->PID = 0;
}
/* Create reset TLB entries for BookE, spanning the 32bit addr space. */
static void mmubooke_create_initial_mapping(CPUPPCState *env,
target_ulong va,
hwaddr pa)
{
ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
tlb->attr = 0;
tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
tlb->size = 1 << 31; /* up to 0x80000000 */
tlb->EPN = va & TARGET_PAGE_MASK;
tlb->RPN = pa & TARGET_PAGE_MASK;
tlb->PID = 0;
}
static void main_cpu_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
@ -253,20 +221,27 @@ static void main_cpu_reset(void *opaque)
cpu_reset(CPU(cpu));
/* either we have a kernel to boot or we jump to U-Boot */
/*
* On reset the flash is mapped by a shadow TLB, but since we
* don't implement them we need to use the same values U-Boot
* will use to avoid a fault.
* either we have a kernel to boot or we jump to U-Boot
*/
if (bi->entry != UBOOT_ENTRY) {
env->gpr[1] = (16 * MiB) - 8;
env->gpr[3] = FDT_ADDR;
env->nip = bi->entry;
/* Create a mapping for the kernel. */
mmubooke_create_initial_mapping(env, 0, 0);
booke_set_tlb(&env->tlb.tlbe[0], 0, 0, 1 << 31);
env->gpr[6] = tswap32(EPAPR_MAGIC);
env->gpr[7] = (16 * MiB) - 8; /* bi->ima_size; */
} else {
env->nip = UBOOT_ENTRY;
mmubooke_create_initial_mapping_uboot(env);
/* Create a mapping for U-Boot. */
booke_set_tlb(&env->tlb.tlbe[0], 0xf0000000, 0xf0000000, 0x10000000);
env->tlb.tlbe[0].RPN |= 4;
}
}