diff options
author | Simon Glass <sjg@chromium.org> | 2020-07-07 13:11:52 -0600 |
---|---|---|
committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 14:32:24 +0800 |
commit | 83b2bd5a74a4a07a738ba039afc3028d8df2f97d (patch) | |
tree | c5f57ccdad2b04017ede514165076a493e61ade3 /lib/acpi | |
parent | 03967ce2e5e4332edd1e023360707a1086f42242 (diff) |
acpi: Support writing an integer
ACPI supports storing integers in various ways. Add a function to handle
this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'lib/acpi')
-rw-r--r-- | lib/acpi/acpigen.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index 9043c2bc72..27d4eab7a6 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -83,6 +83,57 @@ char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el) return p; } +void acpigen_write_byte(struct acpi_ctx *ctx, unsigned int data) +{ + acpigen_emit_byte(ctx, BYTE_PREFIX); + acpigen_emit_byte(ctx, data & 0xff); +} + +void acpigen_write_word(struct acpi_ctx *ctx, unsigned int data) +{ + acpigen_emit_byte(ctx, WORD_PREFIX); + acpigen_emit_word(ctx, data); +} + +void acpigen_write_dword(struct acpi_ctx *ctx, unsigned int data) +{ + acpigen_emit_byte(ctx, DWORD_PREFIX); + acpigen_emit_dword(ctx, data); +} + +void acpigen_write_qword(struct acpi_ctx *ctx, u64 data) +{ + acpigen_emit_byte(ctx, QWORD_PREFIX); + acpigen_emit_dword(ctx, data & 0xffffffff); + acpigen_emit_dword(ctx, (data >> 32) & 0xffffffff); +} + +void acpigen_write_zero(struct acpi_ctx *ctx) +{ + acpigen_emit_byte(ctx, ZERO_OP); +} + +void acpigen_write_one(struct acpi_ctx *ctx) +{ + acpigen_emit_byte(ctx, ONE_OP); +} + +void acpigen_write_integer(struct acpi_ctx *ctx, u64 data) +{ + if (data == 0) + acpigen_write_zero(ctx); + else if (data == 1) + acpigen_write_one(ctx); + else if (data <= 0xff) + acpigen_write_byte(ctx, (unsigned char)data); + else if (data <= 0xffff) + acpigen_write_word(ctx, (unsigned int)data); + else if (data <= 0xffffffff) + acpigen_write_dword(ctx, (unsigned int)data); + else + acpigen_write_qword(ctx, data); +} + void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size) { int i; |