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![Andy Shevchenko](/assets/img/avatar_default.png)
Here is a stub function that generates an empty CSRT. If the target platform provides acpi_fill_csrt() function, it will be used to populate the table. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
607 lines
15 KiB
C
607 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
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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 <serial.h>
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#include <version.h>
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#include <asm/acpi/global_nvs.h>
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#include <asm/acpi_table.h>
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#include <asm/ioapic.h>
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#include <asm/lapic.h>
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#include <asm/mpspec.h>
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#include <asm/tables.h>
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#include <asm/arch/global_nvs.h>
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/*
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* IASL compiles the dsdt entries and writes the hex values
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* to a C array AmlCode[] (see dsdt.c).
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*/
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extern const unsigned char AmlCode[];
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/* ACPI RSDP address to be used in boot parameters */
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static ulong acpi_rsdp_addr;
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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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void acpi_fill_header(struct acpi_table_header *header, char *signature)
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{
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memcpy(header->signature, signature, 4);
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memcpy(header->oem_id, OEM_ID, 6);
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memcpy(header->oem_table_id, OEM_TABLE_ID, 8);
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header->oem_revision = U_BOOT_BUILD_DATE;
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memcpy(header->aslc_id, ASLC_ID, 4);
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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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struct acpi_table_header *header = &(rsdt->header);
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/* Fill out header fields */
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acpi_fill_header(header, "RSDT");
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header->length = sizeof(struct acpi_rsdt);
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header->revision = 1;
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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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struct acpi_table_header *header = &(xsdt->header);
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/* Fill out header fields */
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acpi_fill_header(header, "XSDT");
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header->length = sizeof(struct acpi_xsdt);
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header->revision = 1;
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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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/**
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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(struct acpi_table_header) +
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(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(struct acpi_table_header) +
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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 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;
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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 = ACPI_APIC_LAPIC;
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lapic->length = sizeof(struct acpi_madt_lapic);
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lapic->flags = LOCAL_APIC_FLAG_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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int acpi_create_madt_lapics(u32 current)
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{
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struct udevice *dev;
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int total_length = 0;
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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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int length = 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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current += length;
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total_length += length;
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}
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return total_length;
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}
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int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,
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u32 addr, u32 gsi_base)
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{
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ioapic->type = ACPI_APIC_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 = ACPI_APIC_IRQ_SRC_OVERRIDE;
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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 = ACPI_APIC_LAPIC_NMI;
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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 int acpi_create_madt_irq_overrides(u32 current)
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{
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struct acpi_madt_irqoverride *irqovr;
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u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH;
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int length = 0;
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irqovr = (void *)current;
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length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0);
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irqovr = (void *)(current + length);
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length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags);
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return length;
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}
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__weak u32 acpi_fill_madt(u32 current)
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{
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current += acpi_create_madt_lapics(current);
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current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current,
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io_apic_read(IO_APIC_ID) >> 24, IO_APIC_ADDR, 0);
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current += acpi_create_madt_irq_overrides(current);
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return current;
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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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struct acpi_table_header *header = &(madt->header);
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u32 current = (u32)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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acpi_fill_header(header, "APIC");
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header->length = sizeof(struct acpi_madt);
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header->revision = 4;
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madt->lapic_addr = LAPIC_DEFAULT_BASE;
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madt->flags = ACPI_MADT_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 - (u32)madt;
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header->checksum = table_compute_checksum((void *)madt, header->length);
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}
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int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
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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_l = base;
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mmconfig->base_address_h = 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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__weak u32 acpi_fill_mcfg(u32 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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struct acpi_table_header *header = &(mcfg->header);
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u32 current = (u32)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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acpi_fill_header(header, "MCFG");
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header->length = sizeof(struct acpi_mcfg);
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header->revision = 1;
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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 - (u32)mcfg;
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header->checksum = table_compute_checksum((void *)mcfg, header->length);
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}
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__weak u32 acpi_fill_csrt(u32 current)
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{
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return current;
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}
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static void acpi_create_csrt(struct acpi_csrt *csrt)
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{
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struct acpi_table_header *header = &(csrt->header);
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u32 current = (u32)csrt + sizeof(struct acpi_csrt);
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memset((void *)csrt, 0, sizeof(struct acpi_csrt));
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/* Fill out header fields */
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acpi_fill_header(header, "CSRT");
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header->length = sizeof(struct acpi_csrt);
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header->revision = 0;
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current = acpi_fill_csrt(current);
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/* (Re)calculate length and checksum */
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header->length = current - (u32)csrt;
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header->checksum = table_compute_checksum((void *)csrt, header->length);
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}
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static void acpi_create_spcr(struct acpi_spcr *spcr)
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{
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struct acpi_table_header *header = &(spcr->header);
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struct serial_device_info serial_info = {0};
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ulong serial_address, serial_offset;
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struct udevice *dev;
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uint serial_config;
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uint serial_width;
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int access_size;
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int space_id;
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int ret = -ENODEV;
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/* Fill out header fields */
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acpi_fill_header(header, "SPCR");
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header->length = sizeof(struct acpi_spcr);
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header->revision = 2;
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/* Read the device once, here. It is reused below */
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dev = gd->cur_serial_dev;
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if (dev)
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ret = serial_getinfo(dev, &serial_info);
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if (ret)
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serial_info.type = SERIAL_CHIP_UNKNOWN;
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/* Encode chip type */
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switch (serial_info.type) {
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case SERIAL_CHIP_16550_COMPATIBLE:
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spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE;
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break;
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case SERIAL_CHIP_UNKNOWN:
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default:
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spcr->interface_type = ACPI_DBG2_UNKNOWN;
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break;
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}
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/* Encode address space */
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switch (serial_info.addr_space) {
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case SERIAL_ADDRESS_SPACE_MEMORY:
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space_id = ACPI_ADDRESS_SPACE_MEMORY;
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break;
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case SERIAL_ADDRESS_SPACE_IO:
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default:
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space_id = ACPI_ADDRESS_SPACE_IO;
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break;
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}
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serial_width = serial_info.reg_width * 8;
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serial_offset = serial_info.reg_offset << serial_info.reg_shift;
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serial_address = serial_info.addr + serial_offset;
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/* Encode register access size */
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switch (serial_info.reg_shift) {
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case 0:
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access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
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break;
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case 1:
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access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
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break;
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case 2:
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access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
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break;
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case 3:
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access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS;
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break;
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default:
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access_size = ACPI_ACCESS_SIZE_UNDEFINED;
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break;
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}
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debug("UART type %u @ %lx\n", spcr->interface_type, serial_address);
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/* Fill GAS */
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spcr->serial_port.space_id = space_id;
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spcr->serial_port.bit_width = serial_width;
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spcr->serial_port.bit_offset = 0;
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spcr->serial_port.access_size = access_size;
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spcr->serial_port.addrl = lower_32_bits(serial_address);
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spcr->serial_port.addrh = upper_32_bits(serial_address);
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/* Encode baud rate */
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switch (serial_info.baudrate) {
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case 9600:
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spcr->baud_rate = 3;
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break;
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case 19200:
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spcr->baud_rate = 4;
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break;
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case 57600:
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spcr->baud_rate = 6;
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break;
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case 115200:
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spcr->baud_rate = 7;
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break;
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default:
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spcr->baud_rate = 0;
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break;
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}
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serial_config = SERIAL_DEFAULT_CONFIG;
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if (dev)
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ret = serial_getconfig(dev, &serial_config);
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spcr->parity = SERIAL_GET_PARITY(serial_config);
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spcr->stop_bits = SERIAL_GET_STOP(serial_config);
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/* No PCI devices for now */
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spcr->pci_device_id = 0xffff;
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spcr->pci_vendor_id = 0xffff;
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/* Fix checksum */
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header->checksum = table_compute_checksum((void *)spcr, header->length);
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}
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/*
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* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
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*/
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ulong write_acpi_tables(ulong start)
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{
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u32 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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struct acpi_table_header *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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|
struct acpi_csrt *csrt;
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struct acpi_spcr *spcr;
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int i;
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|
|
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current = start;
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|
|
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/* Align ACPI tables to 16 byte */
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|
current = ALIGN(current, 16);
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|
|
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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;
|
|
current += sizeof(struct acpi_rsdt);
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|
current = ALIGN(current, 16);
|
|
xsdt = (struct acpi_xsdt *)current;
|
|
current += 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);
|
|
|
|
/* clear all table memory */
|
|
memset((void *)start, 0, 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);
|
|
|
|
acpi_create_facs(facs);
|
|
|
|
debug("ACPI: * DSDT\n");
|
|
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);
|
|
|
|
/* 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;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Update DSDT checksum since we patched the GNVS address */
|
|
dsdt->checksum = 0;
|
|
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);
|
|
|
|
debug("ACPI: * FADT\n");
|
|
fadt = (struct acpi_fadt *)current;
|
|
current += sizeof(struct acpi_fadt);
|
|
current = ALIGN(current, 16);
|
|
acpi_create_fadt(fadt, facs, dsdt);
|
|
acpi_add_table(rsdp, fadt);
|
|
|
|
debug("ACPI: * MADT\n");
|
|
madt = (struct acpi_madt *)current;
|
|
acpi_create_madt(madt);
|
|
current += madt->header.length;
|
|
acpi_add_table(rsdp, madt);
|
|
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("ACPI: * CSRT\n");
|
|
csrt = (struct acpi_csrt *)current;
|
|
acpi_create_csrt(csrt);
|
|
current += csrt->header.length;
|
|
acpi_add_table(rsdp, csrt);
|
|
current = ALIGN(current, 16);
|
|
|
|
debug("ACPI: * SPCR\n");
|
|
spcr = (struct acpi_spcr *)current;
|
|
acpi_create_spcr(spcr);
|
|
current += spcr->header.length;
|
|
acpi_add_table(rsdp, spcr);
|
|
current = ALIGN(current, 16);
|
|
|
|
debug("current = %x\n", current);
|
|
|
|
acpi_rsdp_addr = (unsigned long)rsdp;
|
|
debug("ACPI: done\n");
|
|
|
|
return current;
|
|
}
|
|
|
|
ulong acpi_get_rsdp_addr(void)
|
|
{
|
|
return acpi_rsdp_addr;
|
|
}
|