mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 01:17:39 +00:00
40edea3a07
Add a missing memset to acpi_create_spcr().
The other acpi_create_xxxx() functions perform a memset on their
structures, acpi_create_spcr() does not and as a result the contents of
this table are partly uninitialized (and thus random after every reset).
Fixes: b288cd9600
("x86: acpi: Generate SPCR table")
Signed-off-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fix the tags format in the commit message]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
520 lines
13 KiB
C
520 lines
13 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 <log.h>
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#include <dm/uclass-internal.h>
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#include <mapmem.h>
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#include <serial.h>
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#include <version.h>
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#include <acpi/acpigen.h>
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#include <acpi/acpi_table.h>
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#include <asm/acpi/global_nvs.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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#include <dm/acpi.h>
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#include <linux/err.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_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 = ACPI_MADT_REV_ACPI_3_0;
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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 0;
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}
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static int 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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uint ptr;
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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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ptr = acpi_fill_csrt(current);
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if (!ptr)
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return -ENOENT;
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current = ptr;
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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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return 0;
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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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memset((void *)spcr, 0, sizeof(struct acpi_spcr));
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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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/*
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* SPCR has no clue if the UART base clock speed is different
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* to the default one. However, the SPCR 1.04 defines baud rate
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* 0 as a preconfigured state of UART and OS is supposed not
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* to touch the configuration of the serial device.
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*/
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if (serial_info.clock != SERIAL_DEFAULT_CLOCK)
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spcr->baud_rate = 0;
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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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void acpi_create_ssdt(struct acpi_ctx *ctx, struct acpi_table_header *ssdt,
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const char *oem_table_id)
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{
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memset((void *)ssdt, '\0', sizeof(struct acpi_table_header));
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acpi_fill_header(ssdt, "SSDT");
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ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT);
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ssdt->aslc_revision = 1;
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ssdt->length = sizeof(struct acpi_table_header);
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acpi_inc(ctx, sizeof(struct acpi_table_header));
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acpi_fill_ssdt(ctx);
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/* (Re)calculate length and checksum. */
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ssdt->length = ctx->current - (void *)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 drivers/misc/qfw.c
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*/
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ulong write_acpi_tables(ulong start_addr)
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{
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struct acpi_ctx sctx, *ctx = &sctx;
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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_table_header *ssdt;
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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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void *start;
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ulong addr;
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int i;
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start = map_sysmem(start_addr, 0);
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debug("ACPI: Writing ACPI tables at %lx\n", start_addr);
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acpi_setup_base_tables(ctx, start);
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debug("ACPI: * FACS\n");
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facs = ctx->current;
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acpi_inc_align(ctx, sizeof(struct acpi_facs));
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acpi_create_facs(facs);
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debug("ACPI: * DSDT\n");
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dsdt = ctx->current;
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/* Put the table header first */
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memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header));
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acpi_inc(ctx, sizeof(struct acpi_table_header));
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/* If the table is not empty, allow devices to inject things */
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if (dsdt->length >= sizeof(struct acpi_table_header))
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acpi_inject_dsdt(ctx);
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/* Copy in the AML code itself if any (after the header) */
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memcpy(ctx->current,
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(char *)&AmlCode + sizeof(struct acpi_table_header),
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dsdt->length - sizeof(struct acpi_table_header));
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acpi_inc(ctx, dsdt->length - sizeof(struct acpi_table_header));
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/* Pack GNVS into the ACPI table area */
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for (i = 0; i < dsdt->length; i++) {
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u32 *gnvs = (u32 *)((u32)dsdt + i);
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if (*gnvs == ACPI_GNVS_ADDR) {
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ulong addr = (ulong)map_to_sysmem(ctx->current);
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debug("Fix up global NVS in DSDT to %#08lx\n", addr);
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*gnvs = addr;
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break;
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}
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}
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/*
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* Recalculate the length and update the DSDT checksum since we patched
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* the GNVS address. Set the checksum to zero since it is part of the
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* region being checksummed.
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*/
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dsdt->length = ctx->current - (void *)dsdt;
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dsdt->checksum = 0;
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dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);
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acpi_align(ctx);
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/*
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* Fill in platform-specific global NVS variables. If this fails we
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* cannot return the error but this should only happen while debugging.
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*/
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addr = acpi_create_gnvs(ctx->current);
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if (IS_ERR_VALUE(addr))
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printf("Error: Failed to create GNVS\n");
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acpi_inc_align(ctx, sizeof(struct acpi_global_nvs));
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debug("ACPI: * FADT\n");
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fadt = ctx->current;
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acpi_inc_align(ctx, sizeof(struct acpi_fadt));
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acpi_create_fadt(fadt, facs, dsdt);
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acpi_add_table(ctx, fadt);
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debug("ACPI: * SSDT\n");
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ssdt = (struct acpi_table_header *)ctx->current;
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acpi_create_ssdt(ctx, ssdt, OEM_TABLE_ID);
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if (ssdt->length > sizeof(struct acpi_table_header)) {
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acpi_inc_align(ctx, ssdt->length);
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acpi_add_table(ctx, ssdt);
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}
|
|
|
|
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;
|
|
}
|