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| author | David Milosevic <David.Milosevic@9elements.com> | 2023-09-22 14:34:28 +0200 |
|---|---|---|
| committer | Lean Sheng Tan <sheng.tan@9elements.com> | 2023-12-02 19:16:26 +0000 |
| commit | d982274a4ecc8ed6b42724d03332d06d50393109 (patch) | |
| tree | e21488faa5cac62c9b40b209a02ed6da55d0f88c /src/acpi/acpi.c | |
| parent | faf277995999179794d0a571ffc02faaee363c79 (diff) | |
| download | coreboot-d982274a4ecc8ed6b42724d03332d06d50393109.tar.gz coreboot-d982274a4ecc8ed6b42724d03332d06d50393109.tar.bz2 coreboot-d982274a4ecc8ed6b42724d03332d06d50393109.zip | |
acpi: Add PPTT support
This patch adds code to generate Processor Properties
Topology Tables (PPTT) compliant to the ACPI 6.4 specification.
- The 'acpi_get_pptt_topology' hook is mandatory once ACPI_PPTT
is selected. Its purpose is to return a pointer to a topology tree,
which describes the relationship between CPUs and caches. The hook
can be provided by, for example, mainboard code.
Background: We are currently working on mainboard code for qemu-sbsa
and Neoverse N2. Both require a valid PPTT table. Patch was tested
against the qemu-sbsa board.
Change-Id: Ia119e1ba15756704668116bdbc655190ec94ff10
Signed-off-by: David Milosevic <David.Milosevic@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78071
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Diffstat (limited to 'src/acpi/acpi.c')
| -rw-r--r-- | src/acpi/acpi.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index 942d464ad6dd..e40d4ac9aa43 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -1204,6 +1204,18 @@ unsigned long acpi_create_lpi_desc_ncst(acpi_lpi_desc_ncst_t *lpi_desc, uint16_t return lpi_desc->header.length; } +static void acpi_create_pptt(acpi_header_t *header, void *unused) +{ + if (!CONFIG(ACPI_PPTT)) + return; + + if (acpi_fill_header(header, "PPTT", PPTT, sizeof(acpi_pptt_t)) != CB_SUCCESS) + return; + + acpi_pptt_t *pptt = (acpi_pptt_t *)header; + acpi_create_pptt_body(pptt); +} + static uint8_t acpi_spcr_type(void) { /* 16550-compatible with parameters defined in Generic Address Structure */ @@ -1394,6 +1406,7 @@ unsigned long write_acpi_tables(const unsigned long start) { acpi_create_bert, NULL, sizeof(acpi_bert_t) }, { acpi_create_spcr, NULL, sizeof(acpi_spcr_t) }, { acpi_create_gtdt, NULL, sizeof(acpi_gtdt_t) }, + { acpi_create_pptt, NULL, sizeof(acpi_pptt_t) }, }; current = start; @@ -1743,6 +1756,8 @@ int get_acpi_table_revision(enum acpi_tables table) return 4; case GTDT: return 3; + case PPTT: /* ACPI 6.4 */ + return 3; default: return -1; } |