diff options
Diffstat (limited to 'arch/x86/lib/acpi_table.c')
-rw-r--r-- | arch/x86/lib/acpi_table.c | 380 |
1 files changed, 179 insertions, 201 deletions
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 790f6fb..ffb4678 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -2,6 +2,7 @@ * Based on acpi.c from coreboot * * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com> + * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com> * * SPDX-License-Identifier: GPL-2.0+ */ @@ -10,25 +11,92 @@ #include <cpu.h> #include <dm.h> #include <dm/uclass-internal.h> -#include <dm/lists.h> #include <asm/acpi_table.h> -#include <asm/cpu.h> -#include <asm/ioapic.h> +#include <asm/io.h> #include <asm/lapic.h> #include <asm/tables.h> -#include <asm/pci.h> /* - * IASL compiles the dsdt entries and - * writes the hex values to AmlCode array. - * CamelCase cannot be handled here. + * IASL compiles the dsdt entries and writes the hex values + * to a C array AmlCode[] (see dsdt.c). */ extern const unsigned char AmlCode[]; +static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, + struct acpi_xsdt *xsdt) +{ + memset(rsdp, 0, sizeof(struct acpi_rsdp)); + + memcpy(rsdp->signature, RSDP_SIG, 8); + memcpy(rsdp->oem_id, OEM_ID, 6); + + rsdp->length = sizeof(struct acpi_rsdp); + rsdp->rsdt_address = (u32)rsdt; + + /* + * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2 + * + * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2. + * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR + * revision 0) + */ + if (xsdt == NULL) { + rsdp->revision = ACPI_RSDP_REV_ACPI_1_0; + } else { + rsdp->xsdt_address = (u64)(u32)xsdt; + rsdp->revision = ACPI_RSDP_REV_ACPI_2_0; + } + + /* Calculate checksums */ + rsdp->checksum = table_compute_checksum((void *)rsdp, 20); + rsdp->ext_checksum = table_compute_checksum((void *)rsdp, + sizeof(struct acpi_rsdp)); +} + +void acpi_fill_header(struct acpi_table_header *header, char *signature) +{ + memcpy(header->signature, signature, 4); + memcpy(header->oem_id, OEM_ID, 6); + memcpy(header->oem_table_id, OEM_TABLE_ID, 8); + memcpy(header->aslc_id, ASLC_ID, 4); +} + +static void acpi_write_rsdt(struct acpi_rsdt *rsdt) +{ + struct acpi_table_header *header = &(rsdt->header); + + /* Fill out header fields */ + acpi_fill_header(header, "RSDT"); + header->length = sizeof(struct acpi_rsdt); + header->revision = 1; + + /* Entries are filled in later, we come with an empty set */ + + /* Fix checksum */ + header->checksum = table_compute_checksum((void *)rsdt, + sizeof(struct acpi_rsdt)); +} + +static void acpi_write_xsdt(struct acpi_xsdt *xsdt) +{ + struct acpi_table_header *header = &(xsdt->header); + + /* Fill out header fields */ + acpi_fill_header(header, "XSDT"); + header->length = sizeof(struct acpi_xsdt); + header->revision = 1; + + /* Entries are filled in later, we come with an empty set */ + + /* Fix checksum */ + header->checksum = table_compute_checksum((void *)xsdt, + sizeof(struct acpi_xsdt)); +} + /** -* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length -* and checksum. -*/ + * 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; @@ -50,7 +118,7 @@ static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) } if (i >= entries_num) { - debug("ACPI: Error: too many tables.\n"); + debug("ACPI: Error: too many tables\n"); return; } @@ -58,12 +126,13 @@ static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) rsdt->entry[i] = (u32)table; /* Fix RSDT length or the kernel will assume invalid entries */ - rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i + 1)); + 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); + rsdt->header.length); /* * And now the same thing for the XSDT. We use the same index as for @@ -74,8 +143,8 @@ static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) xsdt->entry[i] = (u64)(u32)table; /* Fix XSDT length */ - xsdt->header.length = sizeof(acpi_header_t) + - (sizeof(u64) * (i + 1)); + xsdt->header.length = sizeof(struct acpi_table_header) + + (sizeof(u64) * (i + 1)); /* Re-calculate checksum */ xsdt->header.checksum = 0; @@ -84,38 +153,56 @@ static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) } } +static void acpi_create_facs(struct acpi_facs *facs) +{ + memset((void *)facs, 0, sizeof(struct acpi_facs)); + + memcpy(facs->signature, "FACS", 4); + facs->length = sizeof(struct acpi_facs); + facs->hardware_signature = 0; + facs->firmware_waking_vector = 0; + facs->global_lock = 0; + facs->flags = 0; + facs->x_firmware_waking_vector_l = 0; + facs->x_firmware_waking_vector_h = 0; + facs->version = 1; +} + static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic, - u8 cpu, u8 apic) + u8 cpu, u8 apic) { - lapic->type = LOCALAPIC; /* Local APIC structure */ + lapic->type = ACPI_APIC_LAPIC; lapic->length = sizeof(struct acpi_madt_lapic); - lapic->flags = LOCAL_APIC_FLAG_ENABLED; /* Processor/LAPIC enabled */ + lapic->flags = LOCAL_APIC_FLAG_ENABLED; lapic->processor_id = cpu; lapic->apic_id = apic; return lapic->length; } -unsigned long acpi_create_madt_lapics(unsigned long current) +int acpi_create_madt_lapics(u32 current) { struct udevice *dev; + int length = 0; for (uclass_find_first_device(UCLASS_CPU, &dev); dev; uclass_find_next_device(&dev)) { struct cpu_platdata *plat = dev_get_parent_platdata(dev); - current += acpi_create_madt_lapic( + length += acpi_create_madt_lapic( (struct acpi_madt_lapic *)current, plat->cpu_id, plat->cpu_id); - } - return current; + current += length; + } + + return length; } -int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr, - u32 gsi_base) +int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, + u32 addr, u32 gsi_base) { - ioapic->type = IOAPIC; + ioapic->type = ACPI_APIC_IOAPIC; ioapic->length = sizeof(struct acpi_madt_ioapic); ioapic->reserved = 0x00; ioapic->gsi_base = gsi_base; @@ -126,9 +213,9 @@ int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr, } int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride, - u8 bus, u8 source, u32 gsirq, u16 flags) + u8 bus, u8 source, u32 gsirq, u16 flags) { - irqoverride->type = IRQSOURCEOVERRIDE; + irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE; irqoverride->length = sizeof(struct acpi_madt_irqoverride); irqoverride->bus = bus; irqoverride->source = source; @@ -139,9 +226,9 @@ int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride, } int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, - u8 cpu, u16 flags, u8 lint) + u8 cpu, u16 flags, u8 lint) { - lapic_nmi->type = LOCALNMITYPE; + lapic_nmi->type = ACPI_APIC_LAPIC_NMI; lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi); lapic_nmi->flags = flags; lapic_nmi->processor_id = cpu; @@ -150,45 +237,35 @@ int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, return lapic_nmi->length; } -static void fill_header(acpi_header_t *header, char *signature, int length) -{ - memcpy(header->signature, signature, length); - memcpy(header->oem_id, OEM_ID, 6); - memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8); - memcpy(header->asl_compiler_id, ASLC, 4); -} - static void acpi_create_madt(struct acpi_madt *madt) { - acpi_header_t *header = &(madt->header); - unsigned long current = (unsigned long)madt + sizeof(struct acpi_madt); + struct acpi_table_header *header = &(madt->header); + u32 current = (u32)madt + sizeof(struct acpi_madt); memset((void *)madt, 0, sizeof(struct acpi_madt)); /* Fill out header fields */ - fill_header(header, "APIC", 4); + acpi_fill_header(header, "APIC"); header->length = sizeof(struct acpi_madt); - - /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */ - header->revision = ACPI_REV_ACPI_2_0; + header->revision = 4; madt->lapic_addr = LAPIC_DEFAULT_BASE; - madt->flags = PCAT_COMPAT; + madt->flags = ACPI_MADT_PCAT_COMPAT; current = acpi_fill_madt(current); /* (Re)calculate length and checksum */ - header->length = current - (unsigned long)madt; + header->length = current - (u32)madt; header->checksum = table_compute_checksum((void *)madt, header->length); } static int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, - u32 base, u16 seg_nr, u8 start, u8 end) + u32 base, u16 seg_nr, u8 start, u8 end) { memset(mmconfig, 0, sizeof(*mmconfig)); - mmconfig->base_address = base; - mmconfig->base_reserved = 0; + mmconfig->base_address_l = base; + mmconfig->base_address_h = 0; mmconfig->pci_segment_group_number = seg_nr; mmconfig->start_bus_number = start; mmconfig->end_bus_number = end; @@ -196,11 +273,11 @@ static int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, return sizeof(struct acpi_mcfg_mmconfig); } -static unsigned long acpi_fill_mcfg(unsigned long current) +static u32 acpi_fill_mcfg(u32 current) { current += acpi_create_mcfg_mmconfig ((struct acpi_mcfg_mmconfig *)current, - CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255); + CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255); return current; } @@ -208,132 +285,45 @@ static unsigned long acpi_fill_mcfg(unsigned long current) /* MCFG is defined in the PCI Firmware Specification 3.0 */ static void acpi_create_mcfg(struct acpi_mcfg *mcfg) { - acpi_header_t *header = &(mcfg->header); - unsigned long current = (unsigned long)mcfg + sizeof(struct acpi_mcfg); + struct acpi_table_header *header = &(mcfg->header); + u32 current = (u32)mcfg + sizeof(struct acpi_mcfg); memset((void *)mcfg, 0, sizeof(struct acpi_mcfg)); /* Fill out header fields */ - fill_header(header, "MCFG", 4); + acpi_fill_header(header, "MCFG"); header->length = sizeof(struct acpi_mcfg); - - /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */ - header->revision = ACPI_REV_ACPI_2_0; + header->revision = 1; current = acpi_fill_mcfg(current); /* (Re)calculate length and checksum */ - header->length = current - (unsigned long)mcfg; + header->length = current - (u32)mcfg; header->checksum = table_compute_checksum((void *)mcfg, header->length); } -static void acpi_create_facs(struct acpi_facs *facs) -{ - memset((void *)facs, 0, sizeof(struct acpi_facs)); - - memcpy(facs->signature, "FACS", 4); - facs->length = sizeof(struct acpi_facs); - facs->hardware_signature = 0; - facs->firmware_waking_vector = 0; - facs->global_lock = 0; - facs->flags = 0; - facs->x_firmware_waking_vector_l = 0; - facs->x_firmware_waking_vector_h = 0; - facs->version = 1; /* ACPI 1.0: 0, ACPI 2.0/3.0: 1, ACPI 4.0: 2 */ -} - -static void acpi_write_rsdt(struct acpi_rsdt *rsdt) -{ - acpi_header_t *header = &(rsdt->header); - - /* Fill out header fields */ - fill_header(header, "RSDT", 4); - header->length = sizeof(struct acpi_rsdt); - - /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */ - header->revision = ACPI_REV_ACPI_2_0; - - /* Entries are filled in later, we come with an empty set */ - - /* Fix checksum */ - header->checksum = table_compute_checksum((void *)rsdt, - sizeof(struct acpi_rsdt)); -} - -static void acpi_write_xsdt(struct acpi_xsdt *xsdt) +static void enter_acpi_mode(int pm1_cnt) { - acpi_header_t *header = &(xsdt->header); - - /* Fill out header fields */ - fill_header(header, "XSDT", 4); - header->length = sizeof(struct acpi_xsdt); - - /* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */ - header->revision = ACPI_REV_ACPI_2_0; - - /* Entries are filled in later, we come with an empty set */ - - /* Fix checksum */ - header->checksum = table_compute_checksum((void *)xsdt, - sizeof(struct acpi_xsdt)); -} - -static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, - struct acpi_xsdt *xsdt) -{ - memset(rsdp, 0, sizeof(struct acpi_rsdp)); - - memcpy(rsdp->signature, RSDP_SIG, 8); - memcpy(rsdp->oem_id, OEM_ID, 6); - - rsdp->length = sizeof(struct acpi_rsdp); - rsdp->rsdt_address = (u32)rsdt; - /* - * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2 - * - * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2. - * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR - * revision 0) - */ - if (xsdt == NULL) { - rsdp->revision = ACPI_RSDP_REV_ACPI_1_0; - } else { - rsdp->xsdt_address = (u64)(u32)xsdt; - rsdp->revision = ACPI_RSDP_REV_ACPI_2_0; - } - - /* Calculate checksums */ - rsdp->checksum = table_compute_checksum((void *)rsdp, 20); - rsdp->ext_checksum = table_compute_checksum((void *)rsdp, - sizeof(struct acpi_rsdp)); -} - -static void acpi_create_ssdt_generator(acpi_header_t *ssdt, - const char *oem_table_id) -{ - unsigned long current = (unsigned long)ssdt + sizeof(acpi_header_t); - - memset((void *)ssdt, 0, sizeof(acpi_header_t)); - - memcpy(&ssdt->signature, "SSDT", 4); - /* Access size in ACPI 2.0c/3.0/4.0/5.0 */ - ssdt->revision = ACPI_REV_ACPI_3_0; - memcpy(&ssdt->oem_id, OEM_ID, 6); - memcpy(&ssdt->oem_table_id, oem_table_id, 8); - ssdt->oem_revision = OEM_REVISION; - memcpy(&ssdt->asl_compiler_id, ASLC, 4); - ssdt->asl_compiler_revision = ASL_COMPILER_REVISION; - ssdt->length = sizeof(acpi_header_t); - - /* (Re)calculate length and checksum */ - ssdt->length = current - (unsigned long)ssdt; - ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length); + * PM1_CNT register bit0 selects the power management event to be + * either an SCI or SMI interrupt. When this bit is set, then power + * management events will generate an SCI interrupt. When this bit + * is reset power management events will generate an SMI interrupt. + * + * Per ACPI spec, it is the responsibility of the hardware to set + * or reset this bit. OSPM always preserves this bit position. + * + * U-Boot does not support SMI. And we don't have plan to support + * anything running in SMM within U-Boot. To create a legacy-free + * system, and expose ourselves to OSPM as working under ACPI mode + * already, turn this bit on. + */ + outw(PM1_CNT_SCI_EN, pm1_cnt); } /* * QEMU's version of write_acpi_tables is defined in - * arch/x86/cpu/qemu/fw_cfg.c + * arch/x86/cpu/qemu/acpi_table.c */ u32 write_acpi_tables(u32 start) { @@ -342,18 +332,17 @@ u32 write_acpi_tables(u32 start) struct acpi_rsdt *rsdt; struct acpi_xsdt *xsdt; struct acpi_facs *facs; - acpi_header_t *dsdt; + struct acpi_table_header *dsdt; struct acpi_fadt *fadt; struct acpi_mcfg *mcfg; struct acpi_madt *madt; - acpi_header_t *ssdt; current = start; - /* Align ACPI tables to 16byte */ + /* Align ACPI tables to 16 byte */ current = ALIGN(current, 16); - debug("ACPI: Writing ACPI tables at %lx.\n", start); + debug("ACPI: Writing ACPI tables at %x\n", start); /* We need at least an RSDP and an RSDT Table */ rsdp = (struct acpi_rsdp *)current; @@ -364,7 +353,11 @@ u32 write_acpi_tables(u32 start) current = ALIGN(current, 16); xsdt = (struct acpi_xsdt *)current; current += sizeof(struct acpi_xsdt); - current = ALIGN(current, 16); + /* + * 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); /* clear all table memory */ memset((void *)start, 0, current - start); @@ -381,21 +374,13 @@ u32 write_acpi_tables(u32 start) acpi_create_facs(facs); debug("ACPI: * DSDT\n"); - dsdt = (acpi_header_t *)current; - memcpy(dsdt, &AmlCode, sizeof(acpi_header_t)); - if (dsdt->length >= sizeof(acpi_header_t)) { - current += sizeof(acpi_header_t); - memcpy((char *)current, - (char *)&AmlCode + sizeof(acpi_header_t), - dsdt->length - sizeof(acpi_header_t)); - current += dsdt->length - sizeof(acpi_header_t); - - /* (Re)calculate length and checksum */ - dsdt->length = current - (unsigned long)dsdt; - dsdt->checksum = 0; - dsdt->checksum = table_compute_checksum((void *)dsdt, - dsdt->length); - } + dsdt = (struct acpi_table_header *)current; + memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header)); + current += sizeof(struct acpi_table_header); + memcpy((char *)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); debug("ACPI: * FADT\n"); @@ -405,36 +390,29 @@ u32 write_acpi_tables(u32 start) acpi_create_fadt(fadt, facs, dsdt); acpi_add_table(rsdp, fadt); - debug("ACPI: * MCFG\n"); - mcfg = (struct acpi_mcfg *)current; - acpi_create_mcfg(mcfg); - if (mcfg->header.length > sizeof(struct acpi_mcfg)) { - current += mcfg->header.length; - current = ALIGN(current, 16); - acpi_add_table(rsdp, mcfg); - } - debug("ACPI: * MADT\n"); madt = (struct acpi_madt *)current; acpi_create_madt(madt); - if (madt->header.length > sizeof(struct acpi_madt)) { - current += madt->header.length; - acpi_add_table(rsdp, madt); - } + current += madt->header.length; + acpi_add_table(rsdp, madt); current = ALIGN(current, 16); - debug("ACPI: * SSDT\n"); - ssdt = (acpi_header_t *)current; - acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR); - if (ssdt->length > sizeof(acpi_header_t)) { - current += ssdt->length; - acpi_add_table(rsdp, ssdt); - current = ALIGN(current, 16); - } + debug("ACPI: * MCFG\n"); + mcfg = (struct acpi_mcfg *)current; + acpi_create_mcfg(mcfg); + current += mcfg->header.length; + acpi_add_table(rsdp, mcfg); + current = ALIGN(current, 16); + + debug("current = %x\n", current); - debug("current = %lx\n", current); + debug("ACPI: done\n"); - debug("ACPI: done.\n"); + /* + * Other than waiting for OSPM to request us to switch to ACPI mode, + * do it by ourselves, since SMI will not be triggered. + */ + enter_acpi_mode(fadt->pm1a_cnt_blk); return current; } |