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target/ppc: Add ibm,processor-radix-AP-encodings for TCG

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The ibm,processor-radix-AP-encodings device tree property of the cpu node
is used to specify the radix mode supported page sizes of the processor
to the guest os. Contained in the top 3 bits of the msb is the actual
page size (AP) encoding associated with the corresponding radix mode
supported page size. Add this property for a TCG guest, note the TCG code
is capable of translating any format so just add the 4 default page sizes.

The ibm,processor-radix-AP-encodings device tree property is defined as:
One to n cells in ascending order of radix mode supported page sizes
encoded as BE ints (32bit on ppc) in the form:
0bxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
- 0bxxx -> AP encoding
- 0byyyyyyyyyyyyyyyyyyyyyyyyyyyyy -> supported page size encoded as a shift

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Suraj Jitindar Singh 2017-03-29 16:43:45 +11:00 committed by David Gibson
parent c88fa6dd4a
commit ccd531b9c9
1 changed files with 20 additions and 0 deletions
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20
target/ppc/translate_init.c
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@ -8808,6 +8808,25 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_lpcr;
}
#ifdef CONFIG_SOFTMMU
/*
* Radix pg sizes and AP encodings for dt node ibm,processor-radix-AP-encodings
* Encoded as array of int_32s in the form:
* 0bxxxyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
* x -> AP encoding
* y -> radix mode supported page size (encoded as a shift)
*/
static struct ppc_radix_page_info POWER9_radix_page_info = {
.count = 4,
.entries = {
0x0000000c, /* 4K - enc: 0x0 */
0xa0000010, /* 64K - enc: 0x5 */
0x20000015, /* 2M - enc: 0x1 */
0x4000001e /* 1G - enc: 0x2 */
}
};
#endif /* CONFIG_SOFTMMU */
static void init_proc_POWER9(CPUPPCState *env)
{
/* Common Registers */
@ -8959,6 +8978,7 @@ POWERPC_FAMILY(POWER9)(ObjectClass *oc, void *data)
pcc->handle_mmu_fault = ppc64_v3_handle_mmu_fault;
/* segment page size remain the same */
pcc->sps = &POWER7_POWER8_sps;
pcc->radix_page_info = &POWER9_radix_page_info;
#endif
pcc->excp_model = POWERPC_EXCP_POWER8;
pcc->bus_model = PPC_FLAGS_INPUT_POWER7;