diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/acpi/Makefile | 1 | ||||
| -rw-r--r-- | lib/acpi/acpi_table.c | 1 | ||||
| -rw-r--r-- | lib/acpi/acpigen.c | 39 |
3 files changed, 41 insertions, 0 deletions
diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile index caae6c01bd..85a1f774ad 100644 --- a/lib/acpi/Makefile +++ b/lib/acpi/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0+ # +obj-y += acpigen.o obj-y += acpi_device.o obj-y += acpi_table.o diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index 431776666e..acc55e7fad 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -237,6 +237,7 @@ static void acpi_write_xsdt(struct acpi_xsdt *xsdt) void acpi_setup_base_tables(struct acpi_ctx *ctx, void *start) { + ctx->base = start; ctx->current = start; /* Align ACPI tables to 16 byte */ diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c new file mode 100644 index 0000000000..a42ae26494 --- /dev/null +++ b/lib/acpi/acpigen.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Generation of ACPI (Advanced Configuration and Power Interface) tables + * + * Copyright 2019 Google LLC + * Mostly taken from coreboot + */ + +#define LOG_CATEGORY LOGC_ACPI + +#include <common.h> +#include <dm.h> +#include <acpi/acpigen.h> +#include <dm/acpi.h> + +u8 *acpigen_get_current(struct acpi_ctx *ctx) +{ + return ctx->current; +} + +void acpigen_emit_byte(struct acpi_ctx *ctx, uint data) +{ + *(u8 *)ctx->current++ = data; +} + +void acpigen_emit_word(struct acpi_ctx *ctx, uint data) +{ + acpigen_emit_byte(ctx, data & 0xff); + acpigen_emit_byte(ctx, (data >> 8) & 0xff); +} + +void acpigen_emit_dword(struct acpi_ctx *ctx, uint data) +{ + /* Output the value in little-endian format */ + acpigen_emit_byte(ctx, data & 0xff); + acpigen_emit_byte(ctx, (data >> 8) & 0xff); + acpigen_emit_byte(ctx, (data >> 16) & 0xff); + acpigen_emit_byte(ctx, (data >> 24) & 0xff); +} |