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| author | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2023-11-13 00:53:56 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-12-13 18:39:05 -0500 |
| commit | c7b31a9ad5f596ff28f34d517caf316e9ead1539 (patch) | |
| tree | ddd4318e436bd40d3d28849768503ccdd7d78bd0 /lib/acpi | |
| parent | dbdc9c6aefbf5f90777584ab2f914b34ddfc23e5 (diff) | |
| download | u-boot-c7b31a9ad5f596ff28f34d517caf316e9ead1539.zip u-boot-c7b31a9ad5f596ff28f34d517caf316e9ead1539.tar.gz u-boot-c7b31a9ad5f596ff28f34d517caf316e9ead1539.tar.bz2 | |
acpi: cannot have RSDT above 4 GiB
The field RsdtAddress has only 32 bit. The RSDT table cannot be located
beyond 4 GiB.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/acpi')
| -rw-r--r-- | lib/acpi/base.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/lib/acpi/base.c b/lib/acpi/base.c index 2057bd2..26bf0cb 100644 --- a/lib/acpi/base.c +++ b/lib/acpi/base.c @@ -12,6 +12,7 @@ #include <dm/acpi.h> #include <mapmem.h> #include <tables_csum.h> +#include <linux/sizes.h> void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt) @@ -21,10 +22,13 @@ void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, memcpy(rsdp->signature, RSDP_SIG, 8); memcpy(rsdp->oem_id, OEM_ID, 6); - rsdp->length = sizeof(struct acpi_rsdp); - rsdp->rsdt_address = map_to_sysmem(rsdt); + if (rsdt) + rsdp->rsdt_address = map_to_sysmem(rsdt); + + if (xsdt) + rsdp->xsdt_address = map_to_sysmem(xsdt); - rsdp->xsdt_address = map_to_sysmem(xsdt); + rsdp->length = sizeof(struct acpi_rsdp); rsdp->revision = ACPI_RSDP_REV_ACPI_2_0; /* Calculate checksums */ @@ -68,11 +72,15 @@ static void acpi_write_xsdt(struct acpi_xsdt *xsdt) static int acpi_write_base(struct acpi_ctx *ctx, const struct acpi_writer *entry) { - /* We need at least an RSDP and an RSDT Table */ + /* We need at least an RSDP and an XSDT Table */ ctx->rsdp = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_rsdp)); - ctx->rsdt = ctx->current; - acpi_inc_align(ctx, sizeof(struct acpi_rsdt)); + if (map_to_sysmem(ctx->current) < SZ_4G - SZ_64K) { + ctx->rsdt = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_rsdt)); + } else { + ctx->rsdt = 0; + } ctx->xsdt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_xsdt)); @@ -80,7 +88,8 @@ static int acpi_write_base(struct acpi_ctx *ctx, memset(ctx->base, '\0', ctx->current - ctx->base); acpi_write_rsdp(ctx->rsdp, ctx->rsdt, ctx->xsdt); - acpi_write_rsdt(ctx->rsdt); + if (ctx->rsdt) + acpi_write_rsdt(ctx->rsdt); acpi_write_xsdt(ctx->xsdt); return 0; |