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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 15:38:51 +09:00
![Miao Yan](/assets/img/avatar_default.png)
This patch adds the ability to load and link ACPI tables provided by QEMU. QEMU tells guests how to load and patch ACPI tables through its fw_cfg interface, by adding a firmware file 'etc/table-loader'. Guests are supposed to parse this file and execute corresponding QEMU commands. Signed-off-by: Miao Yan <yanmiaobest@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
441 lines
12 KiB
C
441 lines
12 KiB
C
/*
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* Based on acpi.c from coreboot
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*
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* Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <dm/uclass-internal.h>
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#include <dm/lists.h>
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#include <asm/acpi_table.h>
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#include <asm/cpu.h>
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#include <asm/ioapic.h>
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#include <asm/lapic.h>
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#include <asm/tables.h>
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#include <asm/pci.h>
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/*
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* IASL compiles the dsdt entries and
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* writes the hex values to AmlCode array.
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* CamelCase cannot be handled here.
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*/
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extern const unsigned char AmlCode[];
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/**
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* Add an ACPI table to the RSDT (and XSDT) structure, recalculate length
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* and checksum.
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*/
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static void acpi_add_table(struct acpi_rsdp *rsdp, void *table)
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{
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int i, entries_num;
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struct acpi_rsdt *rsdt;
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struct acpi_xsdt *xsdt = NULL;
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/* The RSDT is mandatory while the XSDT is not */
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rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
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if (rsdp->xsdt_address)
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xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address);
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/* This should always be MAX_ACPI_TABLES */
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entries_num = ARRAY_SIZE(rsdt->entry);
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for (i = 0; i < entries_num; i++) {
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if (rsdt->entry[i] == 0)
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break;
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}
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if (i >= entries_num) {
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debug("ACPI: Error: too many tables.\n");
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return;
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}
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/* Add table to the RSDT */
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rsdt->entry[i] = (u32)table;
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/* Fix RSDT length or the kernel will assume invalid entries */
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rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i + 1));
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/* Re-calculate checksum */
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rsdt->header.checksum = 0;
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rsdt->header.checksum = table_compute_checksum((u8 *)rsdt,
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rsdt->header.length);
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/*
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* And now the same thing for the XSDT. We use the same index as for
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* now we want the XSDT and RSDT to always be in sync in U-Boot
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*/
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if (xsdt) {
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/* Add table to the XSDT */
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xsdt->entry[i] = (u64)(u32)table;
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/* Fix XSDT length */
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xsdt->header.length = sizeof(acpi_header_t) +
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(sizeof(u64) * (i + 1));
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/* Re-calculate checksum */
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xsdt->header.checksum = 0;
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xsdt->header.checksum = table_compute_checksum((u8 *)xsdt,
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xsdt->header.length);
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}
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}
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static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
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u8 cpu, u8 apic)
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{
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lapic->type = LOCALAPIC; /* Local APIC structure */
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lapic->length = sizeof(struct acpi_madt_lapic);
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lapic->flags = LOCAL_APIC_FLAG_ENABLED; /* Processor/LAPIC enabled */
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lapic->processor_id = cpu;
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lapic->apic_id = apic;
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return lapic->length;
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}
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unsigned long acpi_create_madt_lapics(unsigned long current)
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{
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struct udevice *dev;
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for (uclass_find_first_device(UCLASS_CPU, &dev);
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dev;
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uclass_find_next_device(&dev)) {
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struct cpu_platdata *plat = dev_get_parent_platdata(dev);
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current += acpi_create_madt_lapic(
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(struct acpi_madt_lapic *)current,
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plat->cpu_id, plat->cpu_id);
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}
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return current;
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}
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int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr,
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u32 gsi_base)
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{
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ioapic->type = IOAPIC;
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ioapic->length = sizeof(struct acpi_madt_ioapic);
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ioapic->reserved = 0x00;
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ioapic->gsi_base = gsi_base;
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ioapic->ioapic_id = id;
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ioapic->ioapic_addr = addr;
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return ioapic->length;
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}
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int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
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u8 bus, u8 source, u32 gsirq, u16 flags)
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{
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irqoverride->type = IRQSOURCEOVERRIDE;
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irqoverride->length = sizeof(struct acpi_madt_irqoverride);
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irqoverride->bus = bus;
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irqoverride->source = source;
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irqoverride->gsirq = gsirq;
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irqoverride->flags = flags;
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return irqoverride->length;
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}
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int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
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u8 cpu, u16 flags, u8 lint)
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{
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lapic_nmi->type = LOCALNMITYPE;
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lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi);
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lapic_nmi->flags = flags;
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lapic_nmi->processor_id = cpu;
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lapic_nmi->lint = lint;
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return lapic_nmi->length;
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}
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static void fill_header(acpi_header_t *header, char *signature, int length)
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{
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memcpy(header->signature, signature, length);
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memcpy(header->oem_id, OEM_ID, 6);
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memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
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memcpy(header->asl_compiler_id, ASLC, 4);
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}
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static void acpi_create_madt(struct acpi_madt *madt)
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{
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acpi_header_t *header = &(madt->header);
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unsigned long current = (unsigned long)madt + sizeof(struct acpi_madt);
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memset((void *)madt, 0, sizeof(struct acpi_madt));
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/* Fill out header fields */
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fill_header(header, "APIC", 4);
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header->length = sizeof(struct acpi_madt);
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/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
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header->revision = ACPI_REV_ACPI_2_0;
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madt->lapic_addr = LAPIC_DEFAULT_BASE;
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madt->flags = PCAT_COMPAT;
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current = acpi_fill_madt(current);
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/* (Re)calculate length and checksum */
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header->length = current - (unsigned long)madt;
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header->checksum = table_compute_checksum((void *)madt, header->length);
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}
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static int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig,
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u32 base, u16 seg_nr, u8 start, u8 end)
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{
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memset(mmconfig, 0, sizeof(*mmconfig));
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mmconfig->base_address = base;
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mmconfig->base_reserved = 0;
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mmconfig->pci_segment_group_number = seg_nr;
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mmconfig->start_bus_number = start;
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mmconfig->end_bus_number = end;
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return sizeof(struct acpi_mcfg_mmconfig);
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}
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static unsigned long acpi_fill_mcfg(unsigned long current)
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{
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current += acpi_create_mcfg_mmconfig
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((struct acpi_mcfg_mmconfig *)current,
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CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
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return current;
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}
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/* MCFG is defined in the PCI Firmware Specification 3.0 */
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static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
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{
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acpi_header_t *header = &(mcfg->header);
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unsigned long current = (unsigned long)mcfg + sizeof(struct acpi_mcfg);
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memset((void *)mcfg, 0, sizeof(struct acpi_mcfg));
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/* Fill out header fields */
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fill_header(header, "MCFG", 4);
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header->length = sizeof(struct acpi_mcfg);
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/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
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header->revision = ACPI_REV_ACPI_2_0;
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current = acpi_fill_mcfg(current);
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/* (Re)calculate length and checksum */
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header->length = current - (unsigned long)mcfg;
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header->checksum = table_compute_checksum((void *)mcfg, header->length);
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}
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static void acpi_create_facs(struct acpi_facs *facs)
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{
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memset((void *)facs, 0, sizeof(struct acpi_facs));
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memcpy(facs->signature, "FACS", 4);
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facs->length = sizeof(struct acpi_facs);
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facs->hardware_signature = 0;
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facs->firmware_waking_vector = 0;
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facs->global_lock = 0;
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facs->flags = 0;
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facs->x_firmware_waking_vector_l = 0;
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facs->x_firmware_waking_vector_h = 0;
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facs->version = 1; /* ACPI 1.0: 0, ACPI 2.0/3.0: 1, ACPI 4.0: 2 */
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}
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static void acpi_write_rsdt(struct acpi_rsdt *rsdt)
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{
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acpi_header_t *header = &(rsdt->header);
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/* Fill out header fields */
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fill_header(header, "RSDT", 4);
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header->length = sizeof(struct acpi_rsdt);
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/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
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header->revision = ACPI_REV_ACPI_2_0;
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/* Entries are filled in later, we come with an empty set */
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/* Fix checksum */
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header->checksum = table_compute_checksum((void *)rsdt,
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sizeof(struct acpi_rsdt));
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}
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static void acpi_write_xsdt(struct acpi_xsdt *xsdt)
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{
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acpi_header_t *header = &(xsdt->header);
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/* Fill out header fields */
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fill_header(header, "XSDT", 4);
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header->length = sizeof(struct acpi_xsdt);
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/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
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header->revision = ACPI_REV_ACPI_2_0;
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/* Entries are filled in later, we come with an empty set */
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/* Fix checksum */
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header->checksum = table_compute_checksum((void *)xsdt,
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sizeof(struct acpi_xsdt));
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}
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static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
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struct acpi_xsdt *xsdt)
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{
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memset(rsdp, 0, sizeof(struct acpi_rsdp));
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memcpy(rsdp->signature, RSDP_SIG, 8);
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memcpy(rsdp->oem_id, OEM_ID, 6);
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rsdp->length = sizeof(struct acpi_rsdp);
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rsdp->rsdt_address = (u32)rsdt;
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/*
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* Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2
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*
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* Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
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* If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
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* revision 0)
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*/
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if (xsdt == NULL) {
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rsdp->revision = ACPI_RSDP_REV_ACPI_1_0;
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} else {
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rsdp->xsdt_address = (u64)(u32)xsdt;
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rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
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}
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/* Calculate checksums */
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rsdp->checksum = table_compute_checksum((void *)rsdp, 20);
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rsdp->ext_checksum = table_compute_checksum((void *)rsdp,
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sizeof(struct acpi_rsdp));
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}
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static void acpi_create_ssdt_generator(acpi_header_t *ssdt,
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const char *oem_table_id)
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{
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unsigned long current = (unsigned long)ssdt + sizeof(acpi_header_t);
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memset((void *)ssdt, 0, sizeof(acpi_header_t));
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memcpy(&ssdt->signature, "SSDT", 4);
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/* Access size in ACPI 2.0c/3.0/4.0/5.0 */
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ssdt->revision = ACPI_REV_ACPI_3_0;
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memcpy(&ssdt->oem_id, OEM_ID, 6);
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memcpy(&ssdt->oem_table_id, oem_table_id, 8);
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ssdt->oem_revision = OEM_REVISION;
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memcpy(&ssdt->asl_compiler_id, ASLC, 4);
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ssdt->asl_compiler_revision = ASL_COMPILER_REVISION;
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ssdt->length = sizeof(acpi_header_t);
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/* (Re)calculate length and checksum */
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ssdt->length = current - (unsigned long)ssdt;
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ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length);
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}
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/*
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* QEMU's version of write_acpi_tables is defined in
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* arch/x86/cpu/qemu/fw_cfg.c
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*/
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unsigned long write_acpi_tables(unsigned long start)
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{
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unsigned long current;
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struct acpi_rsdp *rsdp;
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struct acpi_rsdt *rsdt;
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struct acpi_xsdt *xsdt;
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struct acpi_facs *facs;
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acpi_header_t *dsdt;
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struct acpi_fadt *fadt;
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struct acpi_mcfg *mcfg;
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struct acpi_madt *madt;
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acpi_header_t *ssdt;
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current = start;
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/* Align ACPI tables to 16byte */
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current = ALIGN(current, 16);
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debug("ACPI: Writing ACPI tables at %lx.\n", start);
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/* We need at least an RSDP and an RSDT Table */
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rsdp = (struct acpi_rsdp *)current;
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current += sizeof(struct acpi_rsdp);
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current = ALIGN(current, 16);
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rsdt = (struct acpi_rsdt *)current;
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current += sizeof(struct acpi_rsdt);
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current = ALIGN(current, 16);
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xsdt = (struct acpi_xsdt *)current;
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current += sizeof(struct acpi_xsdt);
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current = ALIGN(current, 16);
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/* clear all table memory */
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memset((void *)start, 0, current - start);
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acpi_write_rsdp(rsdp, rsdt, xsdt);
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acpi_write_rsdt(rsdt);
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acpi_write_xsdt(xsdt);
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debug("ACPI: * FACS\n");
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facs = (struct acpi_facs *)current;
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current += sizeof(struct acpi_facs);
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current = ALIGN(current, 16);
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acpi_create_facs(facs);
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debug("ACPI: * DSDT\n");
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dsdt = (acpi_header_t *)current;
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memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
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if (dsdt->length >= sizeof(acpi_header_t)) {
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current += sizeof(acpi_header_t);
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memcpy((char *)current,
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(char *)&AmlCode + sizeof(acpi_header_t),
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dsdt->length - sizeof(acpi_header_t));
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current += dsdt->length - sizeof(acpi_header_t);
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/* (Re)calculate length and checksum */
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dsdt->length = current - (unsigned long)dsdt;
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dsdt->checksum = 0;
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dsdt->checksum = table_compute_checksum((void *)dsdt,
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dsdt->length);
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}
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current = ALIGN(current, 16);
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debug("ACPI: * FADT\n");
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fadt = (struct acpi_fadt *)current;
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current += sizeof(struct acpi_fadt);
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current = ALIGN(current, 16);
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acpi_create_fadt(fadt, facs, dsdt);
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acpi_add_table(rsdp, fadt);
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debug("ACPI: * MCFG\n");
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mcfg = (struct acpi_mcfg *)current;
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acpi_create_mcfg(mcfg);
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if (mcfg->header.length > sizeof(struct acpi_mcfg)) {
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current += mcfg->header.length;
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current = ALIGN(current, 16);
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acpi_add_table(rsdp, mcfg);
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}
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debug("ACPI: * MADT\n");
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madt = (struct acpi_madt *)current;
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acpi_create_madt(madt);
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if (madt->header.length > sizeof(struct acpi_madt)) {
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current += madt->header.length;
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acpi_add_table(rsdp, madt);
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}
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current = ALIGN(current, 16);
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debug("ACPI: * SSDT\n");
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ssdt = (acpi_header_t *)current;
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acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
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if (ssdt->length > sizeof(acpi_header_t)) {
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current += ssdt->length;
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acpi_add_table(rsdp, ssdt);
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current = ALIGN(current, 16);
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}
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debug("current = %lx\n", current);
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debug("ACPI: done.\n");
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return current;
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}
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