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 --- lib/acpi/base.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/lib/acpi/base.c b/lib/acpi/base.c index 2057bd2bef..128a76ad39 100644 --- a/lib/acpi/base.c +++ b/lib/acpi/base.c @@ -21,10 +21,17 @@ 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); + else + rsdp->rsdt_address = 0; + + if (xsdt) + rsdp->xsdt_address = map_to_sysmem(xsdt); + else + rsdp->xsdt_address = 0;
- 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 +75,15 @@ 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) < UINT_MAX - 0x10000) { + 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 +91,8 @@ 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;