From patchwork Wed Apr 8 03:01:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 237352 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Tue, 7 Apr 2020 21:01:04 -0600 Subject: [PATCH v4 28/31] acpi: Move acpi_add_table() to generic code In-Reply-To: <20200408030107.168474-1-sjg@chromium.org> References: <20200408030107.168474-1-sjg@chromium.org> Message-ID: <20200407210023.v4.28.Ie9d79ce7293bd55022f7c6e940ce3583d38353da@changeid> Move this code to a generic location so that we can test it with sandbox. This requires adding a few new fields to acpi_ctx, so drop the local variables used in the original code. Also use mapmem to avoid pointer-to-address casts which don't work on sandbox. Signed-off-by: Simon Glass Reviewed-by: Wolfgang Wallner --- Changes in v4: None Changes in v3: - Fix 'RSDP' typo Changes in v2: None arch/x86/lib/acpi_table.c | 83 +++++---------------------------------- include/acpi/acpi_table.h | 9 +++++ include/dm/acpi.h | 5 +++ lib/acpi/acpi_table.c | 61 ++++++++++++++++++++++++++++ test/dm/acpi.c | 4 ++ 5 files changed, 89 insertions(+), 73 deletions(-) diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index e8f0bb18fc5..d4af56eabf4 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -83,67 +83,6 @@ static void acpi_write_xsdt(struct acpi_xsdt *xsdt) sizeof(struct acpi_xsdt)); } -/** - * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length - * and checksum. - */ -static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) -{ - int i, entries_num; - struct acpi_rsdt *rsdt; - struct acpi_xsdt *xsdt; - - /* The RSDT is mandatory while the XSDT is not */ - rsdt = (struct acpi_rsdt *)rsdp->rsdt_address; - - /* This should always be MAX_ACPI_TABLES */ - entries_num = ARRAY_SIZE(rsdt->entry); - - for (i = 0; i < entries_num; i++) { - if (rsdt->entry[i] == 0) - break; - } - - if (i >= entries_num) { - debug("ACPI: Error: too many tables\n"); - return; - } - - /* Add table to the RSDT */ - rsdt->entry[i] = (u32)table; - - /* Fix RSDT length or the kernel will assume invalid entries */ - rsdt->header.length = sizeof(struct acpi_table_header) + - sizeof(u32) * (i + 1); - - /* Re-calculate checksum */ - rsdt->header.checksum = 0; - rsdt->header.checksum = table_compute_checksum((u8 *)rsdt, - rsdt->header.length); - - /* The RSDT is mandatory while the XSDT is not */ - if (!rsdp->xsdt_address) - return; - - /* - * And now the same thing for the XSDT. We use the same index as for - * now we want the XSDT and RSDT to always be in sync in U-Boot - */ - xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address); - - /* Add table to the XSDT */ - xsdt->entry[i] = (u64)(u32)table; - - /* Fix XSDT length */ - xsdt->header.length = sizeof(struct acpi_table_header) + - sizeof(u64) * (i + 1); - - /* Re-calculate checksum */ - xsdt->header.checksum = 0; - xsdt->header.checksum = table_compute_checksum((u8 *)xsdt, - xsdt->header.length); -} - static void acpi_create_facs(struct acpi_facs *facs) { memset((void *)facs, 0, sizeof(struct acpi_facs)); @@ -463,8 +402,6 @@ static void acpi_create_spcr(struct acpi_spcr *spcr) ulong write_acpi_tables(ulong start_addr) { struct acpi_ctx sctx, *ctx = &sctx; - struct acpi_rsdp *rsdp; - struct acpi_rsdt *rsdt; struct acpi_xsdt *xsdt; struct acpi_facs *facs; struct acpi_table_header *dsdt; @@ -486,9 +423,9 @@ ulong write_acpi_tables(ulong start_addr) debug("ACPI: Writing ACPI tables at %lx\n", start_addr); /* We need at least an RSDP and an RSDT Table */ - rsdp = ctx->current; + ctx->rsdp = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_rsdp)); - rsdt = ctx->current; + ctx->rsdt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_rsdt)); xsdt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_xsdt)); @@ -501,8 +438,8 @@ ulong write_acpi_tables(ulong start_addr) /* clear all table memory */ memset((void *)start, 0, ctx->current - start); - acpi_write_rsdp(rsdp, rsdt, xsdt); - acpi_write_rsdt(rsdt); + acpi_write_rsdp(ctx->rsdp, ctx->rsdt, xsdt); + acpi_write_rsdt(ctx->rsdt); acpi_write_xsdt(xsdt); debug("ACPI: * FACS\n"); @@ -544,38 +481,38 @@ ulong write_acpi_tables(ulong start_addr) fadt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_fadt)); acpi_create_fadt(fadt, facs, dsdt); - acpi_add_table(rsdp, fadt); + acpi_add_table(ctx, fadt); debug("ACPI: * MADT\n"); madt = ctx->current; acpi_create_madt(madt); acpi_inc_align(ctx, madt->header.length); - acpi_add_table(rsdp, madt); + acpi_add_table(ctx, madt); debug("ACPI: * MCFG\n"); mcfg = ctx->current; acpi_create_mcfg(mcfg); acpi_inc_align(ctx, mcfg->header.length); - acpi_add_table(rsdp, mcfg); + acpi_add_table(ctx, mcfg); debug("ACPI: * CSRT\n"); csrt = ctx->current; acpi_create_csrt(csrt); acpi_inc_align(ctx, csrt->header.length); - acpi_add_table(rsdp, csrt); + acpi_add_table(ctx, csrt); debug("ACPI: * SPCR\n"); spcr = ctx->current; acpi_create_spcr(spcr); acpi_inc_align(ctx, spcr->header.length); - acpi_add_table(rsdp, spcr); + acpi_add_table(ctx, spcr); acpi_write_dev_tables(ctx); addr = map_to_sysmem(ctx->current); debug("current = %lx\n", addr); - acpi_rsdp_addr = (unsigned long)rsdp; + acpi_rsdp_addr = (unsigned long)ctx->rsdp; debug("ACPI: done\n"); return addr; diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h index 6cca092b965..6225a4c5ccb 100644 --- a/include/acpi/acpi_table.h +++ b/include/acpi/acpi_table.h @@ -553,6 +553,15 @@ void acpi_inc(struct acpi_ctx *ctx, uint amount); */ void acpi_inc_align(struct acpi_ctx *ctx, uint amount); +/** + * acpi_add_table() - Add a new table to the RSDP and XSDT + * + * @ctx: ACPI context + * @table: Table to add + * @return 0 if OK, -E2BIG if too many tables + */ +int acpi_add_table(struct acpi_ctx *ctx, void *table); + #endif /* !__ACPI__*/ #include diff --git a/include/dm/acpi.h b/include/dm/acpi.h index 9a0a437dd03..ee6f7a63e79 100644 --- a/include/dm/acpi.h +++ b/include/dm/acpi.h @@ -30,9 +30,14 @@ * This contains a few useful pieces of information used when writing * * @current: Current address for writing + * @rsdp: Pointer to the Root System Description Pointer, typically used when + * adding a new table. The RSDP holds pointers to the RSDT and XSDT. + * @rsdt: Pointer to the Root System Description Table */ struct acpi_ctx { void *current; + struct acpi_rsdp *rsdp; + struct acpi_rsdt *rsdt; }; /** diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index 07d9bbb0afa..5311ae9368b 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -8,6 +8,8 @@ #include #include #include +#include +#include #include #include #include @@ -120,3 +122,62 @@ void acpi_inc_align(struct acpi_ctx *ctx, uint amount) ctx->current += amount; acpi_align(ctx); } + +/** + * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length + * and checksum. + */ +int acpi_add_table(struct acpi_ctx *ctx, void *table) +{ + int i, entries_num; + struct acpi_rsdt *rsdt; + struct acpi_xsdt *xsdt; + + /* The RSDT is mandatory while the XSDT is not */ + rsdt = ctx->rsdt; + + /* This should always be MAX_ACPI_TABLES */ + entries_num = ARRAY_SIZE(rsdt->entry); + + for (i = 0; i < entries_num; i++) { + if (rsdt->entry[i] == 0) + break; + } + + if (i >= entries_num) { + debug("ACPI: Error: too many tables\n"); + return -E2BIG; + } + + /* Add table to the RSDT */ + rsdt->entry[i] = map_to_sysmem(table); + + /* Fix RSDT length or the kernel will assume invalid entries */ + rsdt->header.length = sizeof(struct acpi_table_header) + + (sizeof(u32) * (i + 1)); + + /* Re-calculate checksum */ + rsdt->header.checksum = 0; + rsdt->header.checksum = table_compute_checksum((u8 *)rsdt, + rsdt->header.length); + + /* + * And now the same thing for the XSDT. We use the same index as for + * now we want the XSDT and RSDT to always be in sync in U-Boot + */ + xsdt = (struct acpi_xsdt *)((uintptr_t)ctx->rsdp->xsdt_address); + + /* Add table to the XSDT */ + xsdt->entry[i] = map_to_sysmem(table); + + /* Fix XSDT length */ + xsdt->header.length = sizeof(struct acpi_table_header) + + (sizeof(u64) * (i + 1)); + + /* Re-calculate checksum */ + xsdt->header.checksum = 0; + xsdt->header.checksum = table_compute_checksum((u8 *)xsdt, + xsdt->header.length); + + return 0; +} diff --git a/test/dm/acpi.c b/test/dm/acpi.c index 17e208ee80e..4dd4a540967 100644 --- a/test/dm/acpi.c +++ b/test/dm/acpi.c @@ -21,10 +21,14 @@ static int testacpi_write_tables(const struct udevice *dev, struct acpi_ctx *ctx) { struct acpi_dmar *dmar; + int ret; dmar = (struct acpi_dmar *)ctx->current; acpi_create_dmar(dmar, DMAR_INTR_REMAP); ctx->current += sizeof(struct acpi_dmar); + ret = acpi_add_table(ctx, dmar); + if (ret) + return log_msg_ret("add", ret); return 0; }