ACPI has a number of CPU-related tables. Add utility functions to write out the basic packages.
Signed-off-by: Simon Glass sjg@chromium.org ---
include/acpi/acpigen.h | 39 +++++++++++++++ lib/acpi/acpigen.c | 55 +++++++++++++++++++++ test/dm/acpigen.c | 106 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 200 insertions(+)
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index c412898169e..3a2c6339d5e 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -64,7 +64,9 @@ enum { OR_OP = 0x7d, NOT_OP = 0x80, DEVICE_OP = 0x82, + PROCESSOR_OP = 0x83, POWER_RES_OP = 0x84, + NOTIFY_OP = 0x86, LEQUAL_OP = 0x93, TO_BUFFER_OP = 0x96, TO_INTEGER_OP = 0x99, @@ -777,4 +779,41 @@ void acpigen_write_dsm_uuid_end(struct acpi_ctx *ctx); */ void acpigen_write_dsm_end(struct acpi_ctx *ctx);
+/** + * acpigen_write_processor() - Write a Processor package + * + * This emits a Processor package header with the required information. The + * caller must complete the information and call acpigen_pop_len() at the end + * + * @ctx: ACPI context pointer + * @cpuindex: CPU number + * @pblock_addr: PBlk system IO address + * @pblock_len: PBlk length + */ +void acpigen_write_processor(struct acpi_ctx *ctx, uint cpuindex, + u32 pblock_addr, uint pblock_len); + +/** + * acpigen_write_processor_package() - Write a package containing the processors + * + * The package containins the name of each processor in the SoC + * + * @ctx: ACPI context pointer + * @name: Package name (.e.g "PPKG") + * @first_core: Number of the first core (e.g. 0) + * @core_count: Number of cores (e.g. 4) + */ +void acpigen_write_processor_package(struct acpi_ctx *ctx, const char *name, + uint first_core, uint core_count); + +/** + * acpigen_write_processor_cnot() - Write a processor notification method + * + * This writes a method that notifies all CPU cores + * + * @ctx: ACPI context pointer + * @num_cores: Number of CPU cores + */ +void acpigen_write_processor_cnot(struct acpi_ctx *ctx, const uint num_cores); + #endif diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index d859f378413..b9985075cde 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -17,6 +17,9 @@ #include <acpi/acpi_table.h> #include <dm/acpi.h>
+/* CPU path format */ +#define ACPI_CPU_STRING "\_PR.CP%02d" + u8 *acpigen_get_current(struct acpi_ctx *ctx) { return ctx->current; @@ -340,6 +343,58 @@ void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name, ACPI_METHOD_SERIALIZED_MASK); }
+void acpigen_write_processor(struct acpi_ctx *ctx, uint cpuindex, + u32 pblock_addr, uint pblock_len) +{ + /* + * Processor (_PR.CPnn, cpuindex, pblock_addr, pblock_len) + * { + */ + char pscope[16]; + + acpigen_emit_ext_op(ctx, PROCESSOR_OP); + acpigen_write_len_f(ctx); + + snprintf(pscope, sizeof(pscope), ACPI_CPU_STRING, cpuindex); + acpigen_emit_namestring(ctx, pscope); + acpigen_emit_byte(ctx, cpuindex); + acpigen_emit_dword(ctx, pblock_addr); + acpigen_emit_byte(ctx, pblock_len); +} + +void acpigen_write_processor_package(struct acpi_ctx *ctx, + const char *const name, + const uint first_core, + const uint core_count) +{ + uint i; + char pscope[16]; + + acpigen_write_name(ctx, name); + acpigen_write_package(ctx, core_count); + for (i = first_core; i < first_core + core_count; ++i) { + snprintf(pscope, sizeof(pscope), ACPI_CPU_STRING, i); + acpigen_emit_namestring(ctx, pscope); + } + acpigen_pop_len(ctx); +} + +void acpigen_write_processor_cnot(struct acpi_ctx *ctx, const uint num_cores) +{ + int core_id; + + acpigen_write_method(ctx, "\_PR.CNOT", 1); + for (core_id = 0; core_id < num_cores; core_id++) { + char buffer[30]; + + snprintf(buffer, sizeof(buffer), ACPI_CPU_STRING, core_id); + acpigen_emit_byte(ctx, NOTIFY_OP); + acpigen_emit_namestring(ctx, buffer); + acpigen_emit_byte(ctx, ARG0_OP); + } + acpigen_pop_len(ctx); +} + void acpigen_write_device(struct acpi_ctx *ctx, const char *name) { acpigen_emit_ext_op(ctx, DEVICE_OP); diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c index da0071d4a9a..4206f5ae3cf 100644 --- a/test/dm/acpigen.c +++ b/test/dm/acpigen.c @@ -1344,3 +1344,109 @@ static int dm_test_acpi_write_i2c_dsm(struct unit_test_state *uts) } DM_TEST(dm_test_acpi_write_i2c_dsm, 0);
+/* Test emitting a processor */ +static int dm_test_acpi_write_processor(struct unit_test_state *uts) +{ + const int cpuindex = 6; + const u32 pblock_addr = 0x12345600; + const u32 pblock_len = 0x60; + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_write_processor(ctx, cpuindex, pblock_addr, pblock_len); + acpigen_pop_len(ctx); + + ut_asserteq(EXT_OP_PREFIX, *ptr++); + ut_asserteq(PROCESSOR_OP, *ptr++); + ut_asserteq(0x13, acpi_test_get_length(ptr)); + ptr += 3; + ut_asserteq_strn("\._PR_CP06", (char *)ptr); + ptr += 10; + ut_asserteq(cpuindex, *ptr++); + ut_asserteq(pblock_addr, get_unaligned((u32 *)ptr)); + ptr += 4; + ut_asserteq(pblock_len, *ptr++); + + ut_asserteq_ptr(ptr, ctx->current); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_write_processor, 0); + +/* Test emitting a processor package */ +static int dm_test_acpi_write_processor_package(struct unit_test_state *uts) +{ + const int core_count = 3; + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_write_processor_package(ctx, "XCPU", 0, core_count); + + ut_asserteq(NAME_OP, *ptr++); + ut_asserteq_strn("XCPU", (char *)ptr); + ptr += 4; + ut_asserteq(PACKAGE_OP, *ptr++); + ptr += 3; /* skip length */ + ut_asserteq(core_count, *ptr++); + + ut_asserteq_strn("\._PR_CP00", (char *)ptr); + ptr += 10; + ut_asserteq_strn("\._PR_CP01", (char *)ptr); + ptr += 10; + ut_asserteq_strn("\._PR_CP02", (char *)ptr); + ptr += 10; + + ut_asserteq_ptr(ptr, ctx->current); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_write_processor_package, 0); + +/* Test emitting a processor notification package */ +static int dm_test_acpi_write_processor_cnot(struct unit_test_state *uts) +{ + const int core_count = 3; + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_write_processor_cnot(ctx, core_count); + + ut_asserteq(METHOD_OP, *ptr++); + ptr += 3; /* skip length */ + ut_asserteq_strn("\._PR_CNOT", (char *)ptr); + ptr += 10; + ut_asserteq(1, *ptr++); + + ut_asserteq(NOTIFY_OP, *ptr++); + ut_asserteq_strn("\._PR_CP00", (char *)ptr); + ptr += 10; + ut_asserteq(ARG0_OP, *ptr++); + ut_asserteq(NOTIFY_OP, *ptr++); + ut_asserteq_strn("\._PR_CP01", (char *)ptr); + ptr += 10; + ut_asserteq(ARG0_OP, *ptr++); + ut_asserteq(NOTIFY_OP, *ptr++); + ut_asserteq_strn("\._PR_CP02", (char *)ptr); + ptr += 10; + ut_asserteq(ARG0_OP, *ptr++); + + ut_asserteq_ptr(ptr, ctx->current); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_write_processor_cnot, 0);