From patchwork Wed Apr 8 03:01:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 237350 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Tue, 7 Apr 2020 21:01:01 -0600 Subject: [PATCH v4 25/31] acpi: Convert part of acpi_table to use acpi_ctx In-Reply-To: <20200408030107.168474-1-sjg@chromium.org> References: <20200408030107.168474-1-sjg@chromium.org> Message-ID: <20200407210023.v4.25.I93e1e33891714417335e1dd517982b18bf9f882f@changeid> The current code uses an address but a pointer would result in fewer casts. Also it repeats the alignment code in a lot of places so this would be better done in a helper function. Update write_acpi_tables() to make use of the new acpi_ctx structure, adding a few helpers to clean things up. Signed-off-by: Simon Glass Reviewed-by: Wolfgang Wallner --- Changes in v4: - Update comment in acpi_inc_align() to show the alignment Changes in v3: - Rename acpi_align_large() to acpi_align64() Changes in v2: None arch/x86/lib/acpi_table.c | 88 +++++++++++++++++++-------------------- include/acpi/acpi_table.h | 36 ++++++++++++++++ lib/acpi/acpi_table.c | 24 ++++++++++- test/dm/acpi.c | 28 +++++++++++++ 4 files changed, 130 insertions(+), 46 deletions(-) diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 98f97208339..484cf66bf4e 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -19,6 +20,7 @@ #include #include #include +#include /* * IASL compiles the dsdt entries and writes the hex values @@ -469,9 +471,9 @@ static void acpi_create_spcr(struct acpi_spcr *spcr) /* * QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c */ -ulong write_acpi_tables(ulong start) +ulong write_acpi_tables(ulong start_addr) { - u32 current; + struct acpi_ctx sctx, *ctx = &sctx; struct acpi_rsdp *rsdp; struct acpi_rsdt *rsdt; struct acpi_xsdt *xsdt; @@ -482,60 +484,61 @@ ulong write_acpi_tables(ulong start) struct acpi_madt *madt; struct acpi_csrt *csrt; struct acpi_spcr *spcr; + void *start; + ulong addr; int i; - current = start; + start = map_sysmem(start_addr, 0); + ctx->current = start; /* Align ACPI tables to 16 byte */ - current = ALIGN(current, 16); + acpi_align(ctx); - debug("ACPI: Writing ACPI tables at %lx\n", start); + debug("ACPI: Writing ACPI tables at %lx\n", start_addr); /* We need at least an RSDP and an RSDT Table */ - rsdp = (struct acpi_rsdp *)current; - current += sizeof(struct acpi_rsdp); - current = ALIGN(current, 16); - rsdt = (struct acpi_rsdt *)current; - current += sizeof(struct acpi_rsdt); - current = ALIGN(current, 16); - xsdt = (struct acpi_xsdt *)current; - current += sizeof(struct acpi_xsdt); + rsdp = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_rsdp)); + rsdt = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_rsdt)); + xsdt = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_xsdt)); /* * Per ACPI spec, the FACS table address must be aligned to a 64 byte * boundary (Windows checks this, but Linux does not). */ - current = ALIGN(current, 64); + acpi_align64(ctx); /* clear all table memory */ - memset((void *)start, 0, current - start); + memset((void *)start, 0, ctx->current - start); acpi_write_rsdp(rsdp, rsdt, xsdt); acpi_write_rsdt(rsdt); acpi_write_xsdt(xsdt); debug("ACPI: * FACS\n"); - facs = (struct acpi_facs *)current; - current += sizeof(struct acpi_facs); - current = ALIGN(current, 16); + facs = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_facs)); acpi_create_facs(facs); debug("ACPI: * DSDT\n"); - dsdt = (struct acpi_table_header *)current; + dsdt = ctx->current; memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header)); - current += sizeof(struct acpi_table_header); - memcpy((char *)current, + acpi_inc(ctx, sizeof(struct acpi_table_header)); + memcpy(ctx->current, (char *)&AmlCode + sizeof(struct acpi_table_header), dsdt->length - sizeof(struct acpi_table_header)); - current += dsdt->length - sizeof(struct acpi_table_header); - current = ALIGN(current, 16); + acpi_inc_align(ctx, dsdt->length - sizeof(struct acpi_table_header)); /* Pack GNVS into the ACPI table area */ for (i = 0; i < dsdt->length; i++) { u32 *gnvs = (u32 *)((u32)dsdt + i); if (*gnvs == ACPI_GNVS_ADDR) { - debug("Fix up global NVS in DSDT to 0x%08x\n", current); - *gnvs = current; + ulong addr = (ulong)map_to_sysmem(ctx->current); + + debug("Fix up global NVS in DSDT to %#08lx\n", addr); + *gnvs = addr; break; } } @@ -545,51 +548,46 @@ ulong write_acpi_tables(ulong start) dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length); /* Fill in platform-specific global NVS variables */ - acpi_create_gnvs((struct acpi_global_nvs *)current); - current += sizeof(struct acpi_global_nvs); - current = ALIGN(current, 16); + acpi_create_gnvs(ctx->current); + acpi_inc_align(ctx, sizeof(struct acpi_global_nvs)); debug("ACPI: * FADT\n"); - fadt = (struct acpi_fadt *)current; - current += sizeof(struct acpi_fadt); - current = ALIGN(current, 16); + fadt = ctx->current; + acpi_inc_align(ctx, sizeof(struct acpi_fadt)); acpi_create_fadt(fadt, facs, dsdt); acpi_add_table(rsdp, fadt); debug("ACPI: * MADT\n"); - madt = (struct acpi_madt *)current; + madt = ctx->current; acpi_create_madt(madt); - current += madt->header.length; + acpi_inc_align(ctx, madt->header.length); acpi_add_table(rsdp, madt); - current = ALIGN(current, 16); debug("ACPI: * MCFG\n"); - mcfg = (struct acpi_mcfg *)current; + mcfg = ctx->current; acpi_create_mcfg(mcfg); - current += mcfg->header.length; + acpi_inc_align(ctx, mcfg->header.length); acpi_add_table(rsdp, mcfg); - current = ALIGN(current, 16); debug("ACPI: * CSRT\n"); - csrt = (struct acpi_csrt *)current; + csrt = ctx->current; acpi_create_csrt(csrt); - current += csrt->header.length; + acpi_inc_align(ctx, csrt->header.length); acpi_add_table(rsdp, csrt); - current = ALIGN(current, 16); debug("ACPI: * SPCR\n"); - spcr = (struct acpi_spcr *)current; + spcr = ctx->current; acpi_create_spcr(spcr); - current += spcr->header.length; + acpi_inc_align(ctx, spcr->header.length); acpi_add_table(rsdp, spcr); - current = ALIGN(current, 16); - debug("current = %x\n", current); + addr = map_to_sysmem(ctx->current); + debug("current = %lx\n", addr); acpi_rsdp_addr = (unsigned long)rsdp; debug("ACPI: done\n"); - return current; + return addr; } ulong acpi_get_rsdp_addr(void) diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h index 7f44b0434b9..6cca092b965 100644 --- a/include/acpi/acpi_table.h +++ b/include/acpi/acpi_table.h @@ -23,6 +23,8 @@ #if !defined(__ACPI__) +struct acpi_ctx; + /* * RSDP (Root System Description Pointer) * Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum @@ -517,6 +519,40 @@ int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags); */ void acpi_fill_header(struct acpi_table_header *header, char *signature); +/** + * acpi_align() - Align the ACPI output pointer to a 16-byte boundary + * + * @ctx: ACPI context + */ +void acpi_align(struct acpi_ctx *ctx); + +/** + * acpi_align64() - Align the ACPI output pointer to a 64-byte boundary + * + * @ctx: ACPI context + */ +void acpi_align64(struct acpi_ctx *ctx); + +/** + * acpi_inc() - Increment the ACPI output pointer by a bit + * + * The pointer is NOT aligned afterwards. + * + * @ctx: ACPI context + * @amount: Amount to increment by + */ +void acpi_inc(struct acpi_ctx *ctx, uint amount); + +/** + * acpi_inc_align() - Increment the ACPI output pointer by a bit and align + * + * The pointer is aligned afterwards to a 16-byte boundary + * + * @ctx: ACPI context + * @amount: Amount to increment by + */ +void acpi_inc_align(struct acpi_ctx *ctx, uint amount); + #endif /* !__ACPI__*/ #include diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index 372f19b16d5..07d9bbb0afa 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -6,10 +6,11 @@ */ #include -#include #include #include #include +#include +#include int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags) { @@ -98,3 +99,24 @@ void acpi_fill_header(struct acpi_table_header *header, char *signature) header->oem_revision = U_BOOT_BUILD_DATE; memcpy(header->aslc_id, ASLC_ID, 4); } + +void acpi_align(struct acpi_ctx *ctx) +{ + ctx->current = (void *)ALIGN((ulong)ctx->current, 16); +} + +void acpi_align64(struct acpi_ctx *ctx) +{ + ctx->current = (void *)ALIGN((ulong)ctx->current, 64); +} + +void acpi_inc(struct acpi_ctx *ctx, uint amount) +{ + ctx->current += amount; +} + +void acpi_inc_align(struct acpi_ctx *ctx, uint amount) +{ + ctx->current += amount; + acpi_align(ctx); +} diff --git a/test/dm/acpi.c b/test/dm/acpi.c index 5743530a3a5..17e208ee80e 100644 --- a/test/dm/acpi.c +++ b/test/dm/acpi.c @@ -151,3 +151,31 @@ static int dm_test_acpi_write_tables(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_acpi_write_tables, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test basic ACPI functions */ +static int dm_test_acpi_basic(struct unit_test_state *uts) +{ + struct acpi_ctx ctx; + + /* Check align works */ + ctx.current = (void *)5; + acpi_align(&ctx); + ut_asserteq_ptr((void *)16, ctx.current); + + /* Check that align does nothing if already aligned */ + acpi_align(&ctx); + ut_asserteq_ptr((void *)16, ctx.current); + acpi_align64(&ctx); + ut_asserteq_ptr((void *)64, ctx.current); + acpi_align64(&ctx); + ut_asserteq_ptr((void *)64, ctx.current); + + /* Check incrementing */ + acpi_inc(&ctx, 3); + ut_asserteq_ptr((void *)67, ctx.current); + acpi_inc_align(&ctx, 3); + ut_asserteq_ptr((void *)80, ctx.current); + + return 0; +} +DM_TEST(dm_test_acpi_basic, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);