u-boot/arch/x86/lib/acpi_table.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Based on acpi.c from coreboot
*
* Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <log.h>
#include <dm/uclass-internal.h>
#include <mapmem.h>
#include <serial.h>
#include <version.h>
#include <acpi/acpigen.h>
#include <acpi/acpi_table.h>
#include <asm/acpi/global_nvs.h>
#include <asm/ioapic.h>
#include <asm/lapic.h>
#include <asm/mpspec.h>
#include <asm/tables.h>
#include <asm/arch/global_nvs.h>
#include <dm/acpi.h>
#include <linux/err.h>
/*
* IASL compiles the dsdt entries and writes the hex values
* to a C array AmlCode[] (see dsdt.c).
*/
extern const unsigned char AmlCode[];
/* ACPI RSDP address to be used in boot parameters */
static ulong acpi_rsdp_addr;
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)
{
lapic->type = ACPI_APIC_LAPIC;
lapic->length = sizeof(struct acpi_madt_lapic);
lapic->flags = LOCAL_APIC_FLAG_ENABLED;
lapic->processor_id = cpu;
lapic->apic_id = apic;
return lapic->length;
}
int acpi_create_madt_lapics(u32 current)
{
struct udevice *dev;
int total_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);
int length = acpi_create_madt_lapic(
(struct acpi_madt_lapic *)current,
plat->cpu_id, plat->cpu_id);
current += length;
total_length += length;
}
return total_length;
}
int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,
u32 addr, u32 gsi_base)
{
ioapic->type = ACPI_APIC_IOAPIC;
ioapic->length = sizeof(struct acpi_madt_ioapic);
ioapic->reserved = 0x00;
ioapic->gsi_base = gsi_base;
ioapic->ioapic_id = id;
ioapic->ioapic_addr = addr;
return ioapic->length;
}
int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride,
u8 bus, u8 source, u32 gsirq, u16 flags)
{
irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE;
irqoverride->length = sizeof(struct acpi_madt_irqoverride);
irqoverride->bus = bus;
irqoverride->source = source;
irqoverride->gsirq = gsirq;
irqoverride->flags = flags;
return irqoverride->length;
}
int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
u8 cpu, u16 flags, u8 lint)
{
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;
lapic_nmi->lint = lint;
return lapic_nmi->length;
}
static int acpi_create_madt_irq_overrides(u32 current)
{
struct acpi_madt_irqoverride *irqovr;
u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH;
int length = 0;
irqovr = (void *)current;
length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0);
irqovr = (void *)(current + length);
length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags);
return length;
}
__weak u32 acpi_fill_madt(u32 current)
{
current += acpi_create_madt_lapics(current);
current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current,
io_apic_read(IO_APIC_ID) >> 24, IO_APIC_ADDR, 0);
current += acpi_create_madt_irq_overrides(current);
return current;
}
static void acpi_create_madt(struct acpi_madt *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 */
acpi_fill_header(header, "APIC");
header->length = sizeof(struct acpi_madt);
header->revision = ACPI_MADT_REV_ACPI_3_0;
madt->lapic_addr = LAPIC_DEFAULT_BASE;
madt->flags = ACPI_MADT_PCAT_COMPAT;
current = acpi_fill_madt(current);
/* (Re)calculate length and checksum */
header->length = current - (u32)madt;
header->checksum = table_compute_checksum((void *)madt, header->length);
}
int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
u16 seg_nr, u8 start, u8 end)
{
memset(mmconfig, 0, sizeof(*mmconfig));
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;
return sizeof(struct acpi_mcfg_mmconfig);
}
__weak u32 acpi_fill_mcfg(u32 current)
{
current += acpi_create_mcfg_mmconfig
((struct acpi_mcfg_mmconfig *)current,
CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255);
return current;
}
/* MCFG is defined in the PCI Firmware Specification 3.0 */
static void acpi_create_mcfg(struct acpi_mcfg *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 */
acpi_fill_header(header, "MCFG");
header->length = sizeof(struct acpi_mcfg);
header->revision = 1;
current = acpi_fill_mcfg(current);
/* (Re)calculate length and checksum */
header->length = current - (u32)mcfg;
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
__weak u32 acpi_fill_csrt(u32 current)
{
return 0;
}
static int acpi_create_csrt(struct acpi_csrt *csrt)
{
struct acpi_table_header *header = &(csrt->header);
u32 current = (u32)csrt + sizeof(struct acpi_csrt);
uint ptr;
memset((void *)csrt, 0, sizeof(struct acpi_csrt));
/* Fill out header fields */
acpi_fill_header(header, "CSRT");
header->length = sizeof(struct acpi_csrt);
header->revision = 0;
ptr = acpi_fill_csrt(current);
if (!ptr)
return -ENOENT;
current = ptr;
/* (Re)calculate length and checksum */
header->length = current - (u32)csrt;
header->checksum = table_compute_checksum((void *)csrt, header->length);
return 0;
}
static void acpi_create_spcr(struct acpi_spcr *spcr)
{
struct acpi_table_header *header = &(spcr->header);
struct serial_device_info serial_info = {0};
ulong serial_address, serial_offset;
struct udevice *dev;
uint serial_config;
uint serial_width;
int access_size;
int space_id;
int ret = -ENODEV;
memset((void *)spcr, 0, sizeof(struct acpi_spcr));
/* Fill out header fields */
acpi_fill_header(header, "SPCR");
header->length = sizeof(struct acpi_spcr);
header->revision = 2;
/* Read the device once, here. It is reused below */
dev = gd->cur_serial_dev;
if (dev)
ret = serial_getinfo(dev, &serial_info);
if (ret)
serial_info.type = SERIAL_CHIP_UNKNOWN;
/* Encode chip type */
switch (serial_info.type) {
case SERIAL_CHIP_16550_COMPATIBLE:
spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE;
break;
case SERIAL_CHIP_UNKNOWN:
default:
spcr->interface_type = ACPI_DBG2_UNKNOWN;
break;
}
/* Encode address space */
switch (serial_info.addr_space) {
case SERIAL_ADDRESS_SPACE_MEMORY:
space_id = ACPI_ADDRESS_SPACE_MEMORY;
break;
case SERIAL_ADDRESS_SPACE_IO:
default:
space_id = ACPI_ADDRESS_SPACE_IO;
break;
}
serial_width = serial_info.reg_width * 8;
serial_offset = serial_info.reg_offset << serial_info.reg_shift;
serial_address = serial_info.addr + serial_offset;
/* Encode register access size */
switch (serial_info.reg_shift) {
case 0:
access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
break;
case 1:
access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
break;
case 2:
access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
break;
case 3:
access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS;
break;
default:
access_size = ACPI_ACCESS_SIZE_UNDEFINED;
break;
}
debug("UART type %u @ %lx\n", spcr->interface_type, serial_address);
/* Fill GAS */
spcr->serial_port.space_id = space_id;
spcr->serial_port.bit_width = serial_width;
spcr->serial_port.bit_offset = 0;
spcr->serial_port.access_size = access_size;
spcr->serial_port.addrl = lower_32_bits(serial_address);
spcr->serial_port.addrh = upper_32_bits(serial_address);
/* Encode baud rate */
switch (serial_info.baudrate) {
case 9600:
spcr->baud_rate = 3;
break;
case 19200:
spcr->baud_rate = 4;
break;
case 57600:
spcr->baud_rate = 6;
break;
case 115200:
spcr->baud_rate = 7;
break;
default:
spcr->baud_rate = 0;
break;
}
serial_config = SERIAL_DEFAULT_CONFIG;
if (dev)
ret = serial_getconfig(dev, &serial_config);
spcr->parity = SERIAL_GET_PARITY(serial_config);
spcr->stop_bits = SERIAL_GET_STOP(serial_config);
/* No PCI devices for now */
spcr->pci_device_id = 0xffff;
spcr->pci_vendor_id = 0xffff;
/*
* SPCR has no clue if the UART base clock speed is different
* to the default one. However, the SPCR 1.04 defines baud rate
* 0 as a preconfigured state of UART and OS is supposed not
* to touch the configuration of the serial device.
*/
if (serial_info.clock != SERIAL_DEFAULT_CLOCK)
spcr->baud_rate = 0;
/* Fix checksum */
header->checksum = table_compute_checksum((void *)spcr, header->length);
}
void acpi_create_ssdt(struct acpi_ctx *ctx, struct acpi_table_header *ssdt,
const char *oem_table_id)
{
memset((void *)ssdt, '\0', sizeof(struct acpi_table_header));
acpi_fill_header(ssdt, "SSDT");
ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT);
ssdt->aslc_revision = 1;
ssdt->length = sizeof(struct acpi_table_header);
acpi_inc(ctx, sizeof(struct acpi_table_header));
acpi_fill_ssdt(ctx);
/* (Re)calculate length and checksum. */
ssdt->length = ctx->current - (void *)ssdt;
ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length);
}
/*
* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
*/
ulong write_acpi_tables(ulong start_addr)
{
struct acpi_ctx sctx, *ctx = &sctx;
struct acpi_facs *facs;
struct acpi_table_header *dsdt;
struct acpi_fadt *fadt;
struct acpi_table_header *ssdt;
struct acpi_mcfg *mcfg;
struct acpi_madt *madt;
struct acpi_csrt *csrt;
struct acpi_spcr *spcr;
void *start;
ulong addr;
int i;
start = map_sysmem(start_addr, 0);
debug("ACPI: Writing ACPI tables at %lx\n", start_addr);
acpi_setup_base_tables(ctx, start);
debug("ACPI: * FACS\n");
facs = ctx->current;
acpi_inc_align(ctx, sizeof(struct acpi_facs));
acpi_create_facs(facs);
debug("ACPI: * DSDT\n");
dsdt = ctx->current;
/* Put the table header first */
memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header));
acpi_inc(ctx, sizeof(struct acpi_table_header));
/* If the table is not empty, allow devices to inject things */
if (dsdt->length >= sizeof(struct acpi_table_header))
acpi_inject_dsdt(ctx);
/* Copy in the AML code itself if any (after the header) */
memcpy(ctx->current,
(char *)&AmlCode + sizeof(struct acpi_table_header),
dsdt->length - sizeof(struct acpi_table_header));
acpi_inc(ctx, dsdt->length - sizeof(struct acpi_table_header));
/* Pack GNVS into the ACPI table area */
for (i = 0; i < dsdt->length; i++) {
u32 *gnvs = (u32 *)((u32)dsdt + i);
if (*gnvs == ACPI_GNVS_ADDR) {
ulong addr = (ulong)map_to_sysmem(ctx->current);
debug("Fix up global NVS in DSDT to %#08lx\n", addr);
*gnvs = addr;
break;
}
}
/*
* Recalculate the length and update the DSDT checksum since we patched
* the GNVS address. Set the checksum to zero since it is part of the
* region being checksummed.
*/
dsdt->length = ctx->current - (void *)dsdt;
dsdt->checksum = 0;
dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);
acpi_align(ctx);
/*
* Fill in platform-specific global NVS variables. If this fails we
* cannot return the error but this should only happen while debugging.
*/
addr = acpi_create_gnvs(ctx->current);
if (IS_ERR_VALUE(addr))
printf("Error: Failed to create GNVS\n");
acpi_inc_align(ctx, sizeof(struct acpi_global_nvs));
debug("ACPI: * FADT\n");
fadt = ctx->current;
acpi_inc_align(ctx, sizeof(struct acpi_fadt));
acpi_create_fadt(fadt, facs, dsdt);
acpi_add_table(ctx, fadt);
debug("ACPI: * SSDT\n");
ssdt = (struct acpi_table_header *)ctx->current;
acpi_create_ssdt(ctx, ssdt, OEM_TABLE_ID);
if (ssdt->length > sizeof(struct acpi_table_header)) {
acpi_inc_align(ctx, ssdt->length);
acpi_add_table(ctx, ssdt);
}
debug("ACPI: * MCFG\n");
mcfg = ctx->current;
acpi_create_mcfg(mcfg);
acpi_inc_align(ctx, mcfg->header.length);
acpi_add_table(ctx, mcfg);
debug("ACPI: * MADT\n");
madt = ctx->current;
acpi_create_madt(madt);
acpi_inc_align(ctx, madt->header.length);
acpi_add_table(ctx, madt);
debug("ACPI: * CSRT\n");
csrt = ctx->current;
if (!acpi_create_csrt(csrt)) {
acpi_inc_align(ctx, csrt->header.length);
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(ctx, spcr);
acpi_write_dev_tables(ctx);
addr = map_to_sysmem(ctx->current);
debug("current = %lx\n", addr);
acpi_rsdp_addr = (unsigned long)ctx->rsdp;
debug("ACPI: done\n");
return addr;
}
ulong acpi_get_rsdp_addr(void)
{
return acpi_rsdp_addr;
}