Move this table over to use a writer function, moving the code from the x86 implementation.
Add a pointer to the DSDT in struct acpi_ctx so we can reference it later.
Disable this table for sandbox since we don't actually compile real ASL code.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/x86/lib/acpi_table.c | 49 +++++----------------------------- include/dm/acpi.h | 2 ++ lib/acpi/Makefile | 6 +++++ lib/acpi/base.c | 2 ++ lib/acpi/dsdt.c | 55 +++++++++++++++++++++++++++++++++++++++ lib/acpi/facs.c | 2 ++ 6 files changed, 74 insertions(+), 42 deletions(-) create mode 100644 lib/acpi/dsdt.c
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 22f34a46d07..e0c76ab279f 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -29,12 +29,6 @@ #include <dm/acpi.h> #include <linux/err.h>
-/* - * IASL compiles the dsdt entries and writes the hex values - * to a C array AmlCode[] (see dsdt.c). - */ -extern const unsigned char AmlCode[]; - /* ACPI RSDP address to be used in boot parameters */ static ulong acpi_rsdp_addr;
@@ -491,8 +485,6 @@ static int acpi_create_ssdt(struct acpi_ctx *ctx, static int write_acpi_tables_x86(struct acpi_ctx *ctx, const struct acpi_writer *entry) { - const int thl = sizeof(struct acpi_table_header); - struct acpi_table_header *dsdt; struct acpi_fadt *fadt; struct acpi_table_header *ssdt; struct acpi_mcfg *mcfg; @@ -500,42 +492,14 @@ static int write_acpi_tables_x86(struct acpi_ctx *ctx, struct acpi_madt *madt; struct acpi_csrt *csrt; struct acpi_spcr *spcr; - int aml_len; ulong addr; int ret; int i;
- debug("ACPI: * DSDT\n"); - dsdt = ctx->current; - - /* Put the table header first */ - memcpy(dsdt, &AmlCode, thl); - acpi_inc(ctx, thl); - log_debug("DSDT starts at %p, hdr ends at %p\n", dsdt, ctx->current); - - /* If the table is not empty, allow devices to inject things */ - aml_len = dsdt->length - thl; - if (aml_len) { - void *base = ctx->current; - - acpi_inject_dsdt(ctx); - log_debug("Added %x bytes from inject_dsdt, now at %p\n", - ctx->current - base, ctx->current); - log_debug("Copy AML code size %x to %p\n", aml_len, - ctx->current); - memcpy(ctx->current, AmlCode + thl, aml_len); - acpi_inc(ctx, aml_len); - } - - dsdt->length = ctx->current - (void *)dsdt; - acpi_align(ctx); - log_debug("Updated DSDT length to %x, total %x\n", dsdt->length, - ctx->current - (void *)dsdt); - if (!IS_ENABLED(CONFIG_ACPI_GNVS_EXTERNAL)) { /* Pack GNVS into the ACPI table area */ - for (i = 0; i < dsdt->length; i++) { - u32 *gnvs = (u32 *)((u32)dsdt + i); + for (i = 0; i < ctx->dsdt->length; i++) { + u32 *gnvs = (u32 *)((u32)ctx->dsdt + i);
if (*gnvs == ACPI_GNVS_ADDR) { *gnvs = map_to_sysmem(ctx->current); @@ -561,8 +525,9 @@ static int write_acpi_tables_x86(struct acpi_ctx *ctx, * the GNVS address. Set the checksum to zero since it is part of the * region being checksummed. */ - dsdt->checksum = 0; - dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length); + ctx->dsdt->checksum = 0; + ctx->dsdt->checksum = table_compute_checksum((void *)ctx->dsdt, + ctx->dsdt->length);
/* * Fill in platform-specific global NVS variables. If this fails we @@ -577,7 +542,7 @@ static int write_acpi_tables_x86(struct acpi_ctx *ctx, debug("ACPI: * FADT\n"); fadt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_fadt)); - acpi_create_fadt(fadt, ctx->facs, dsdt); + acpi_create_fadt(fadt, ctx->facs, ctx->dsdt); acpi_add_table(ctx, fadt);
debug("ACPI: * SSDT\n"); @@ -644,7 +609,7 @@ static int write_acpi_tables_x86(struct acpi_ctx *ctx,
return 0; } -ACPI_WRITER(2x86, NULL, write_acpi_tables_x86, 0); +ACPI_WRITER(9x86, NULL, write_acpi_tables_x86, 0);
ulong acpi_get_rsdp_addr(void) { diff --git a/include/dm/acpi.h b/include/dm/acpi.h index c19a7717771..bdde0152758 100644 --- a/include/dm/acpi.h +++ b/include/dm/acpi.h @@ -53,6 +53,7 @@ enum acpi_dump_option { * @rsdt: Pointer to the Root System Description Table * @xsdt: Pointer to the Extended System Description Table * @facs: Pointer to the Firmware ACPI Control Structure + * @dsdt: Pointer to the Differentiated System Description Table * @nhlt: Intel Non-High-Definition-Audio Link Table (NHLT) pointer, used to * build up information that audio codecs need to provide in the NHLT ACPI * table @@ -67,6 +68,7 @@ struct acpi_ctx { struct acpi_rsdt *rsdt; struct acpi_xsdt *xsdt; struct acpi_facs *facs; + struct acpi_table_header *dsdt; struct nhlt *nhlt; char *len_stack[ACPIGEN_LENSTACK_SIZE]; int ltop; diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile index 9f70fe69d3e..ccdf42896dc 100644 --- a/lib/acpi/Makefile +++ b/lib/acpi/Makefile @@ -10,5 +10,11 @@ obj-y += acpi_writer.o # With QEMU the ACPI tables come from there, not from U-Boot ifndef CONFIG_QEMU obj-y += base.o + +# Sandbox does not build a .asl file +ifndef CONFIG_SANDBOX +obj-y += dsdt.o +endif + obj-y += facs.o endif diff --git a/lib/acpi/base.c b/lib/acpi/base.c index 3e8d703934e..2057bd2bef8 100644 --- a/lib/acpi/base.c +++ b/lib/acpi/base.c @@ -5,6 +5,8 @@ * Copyright 2021 Google LLC */
+#define LOG_CATEGORY LOGC_ACPI + #include <common.h> #include <acpi/acpi_table.h> #include <dm/acpi.h> diff --git a/lib/acpi/dsdt.c b/lib/acpi/dsdt.c new file mode 100644 index 00000000000..db98cc20e1d --- /dev/null +++ b/lib/acpi/dsdt.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Write the ACPI Differentiated System Description Table (DSDT) + * + * Copyright 2021 Google LLC + */ + +#define LOG_CATEGORY LOGC_ACPI + +#include <common.h> +#include <acpi/acpi_table.h> +#include <dm/acpi.h> +#include <tables_csum.h> + +/* + * IASL compiles the dsdt entries and writes the hex values + * to a C array AmlCode[] (see dsdt.c). + */ +extern const unsigned char AmlCode[]; + +int acpi_write_dsdt(struct acpi_ctx *ctx, const struct acpi_writer *entry) +{ + const int thl = sizeof(struct acpi_table_header); + struct acpi_table_header *dsdt = ctx->current; + int aml_len; + + /* Put the table header first */ + memcpy(dsdt, &AmlCode, thl); + acpi_inc(ctx, thl); + log_debug("DSDT starts at %p, hdr ends at %p\n", dsdt, ctx->current); + + /* If the table is not empty, allow devices to inject things */ + aml_len = dsdt->length - thl; + if (aml_len) { + void *base = ctx->current; + int ret; + + ret = acpi_inject_dsdt(ctx); + if (ret) + return log_msg_ret("inject", ret); + log_debug("Added %lx bytes from inject_dsdt, now at %p\n", + (ulong)(ctx->current - base), ctx->current); + log_debug("Copy AML code size %x to %p\n", aml_len, + ctx->current); + memcpy(ctx->current, AmlCode + thl, aml_len); + acpi_inc(ctx, aml_len); + } + + ctx->dsdt = dsdt; + dsdt->length = ctx->current - (void *)dsdt; + log_debug("Updated DSDT length to %x\n", dsdt->length); + + return 0; +} +ACPI_WRITER(3dsdt, "DSDT", acpi_write_dsdt, 0); diff --git a/lib/acpi/facs.c b/lib/acpi/facs.c index 8a1568fbaa0..e89f43ca5c9 100644 --- a/lib/acpi/facs.c +++ b/lib/acpi/facs.c @@ -5,6 +5,8 @@ * Copyright 2021 Google LLC */
+#define LOG_CATEGORY LOGC_ACPI + #include <common.h> #include <acpi/acpi_table.h> #include <dm/acpi.h>