mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 12:45:42 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
153 lines
3.1 KiB
C
153 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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/*
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* Intel Simple Firmware Interface (SFI)
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*
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* Yet another way to pass information to the Linux kernel.
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*
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* See https://simplefirmware.org/ for details
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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 <asm/cpu.h>
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#include <asm/ioapic.h>
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#include <asm/sfi.h>
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#include <asm/tables.h>
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#include <dm/uclass-internal.h>
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struct table_info {
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u32 base;
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int ptr;
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u32 entry_start;
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u64 table[SFI_TABLE_MAX_ENTRIES];
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int count;
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};
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static void *get_entry_start(struct table_info *tab)
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{
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if (tab->count == SFI_TABLE_MAX_ENTRIES)
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return NULL;
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tab->entry_start = tab->base + tab->ptr;
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tab->table[tab->count] = tab->entry_start;
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tab->entry_start += sizeof(struct sfi_table_header);
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return (void *)(uintptr_t)tab->entry_start;
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}
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static void finish_table(struct table_info *tab, const char *sig, void *entry)
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{
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struct sfi_table_header *hdr;
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hdr = (struct sfi_table_header *)(uintptr_t)(tab->base + tab->ptr);
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strcpy(hdr->sig, sig);
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hdr->len = sizeof(*hdr) + ((ulong)entry - tab->entry_start);
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hdr->rev = 1;
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strncpy(hdr->oem_id, "U-Boot", SFI_OEM_ID_SIZE);
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strncpy(hdr->oem_table_id, "Table v1", SFI_OEM_TABLE_ID_SIZE);
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hdr->csum = 0;
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hdr->csum = table_compute_checksum(hdr, hdr->len);
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tab->ptr += hdr->len;
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tab->ptr = ALIGN(tab->ptr, 16);
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tab->count++;
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}
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static int sfi_write_system_header(struct table_info *tab)
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{
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u64 *entry = get_entry_start(tab);
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int i;
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if (!entry)
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return -ENOSPC;
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for (i = 0; i < tab->count; i++)
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*entry++ = tab->table[i];
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finish_table(tab, SFI_SIG_SYST, entry);
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return 0;
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}
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static int sfi_write_cpus(struct table_info *tab)
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{
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struct sfi_cpu_table_entry *entry = get_entry_start(tab);
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struct udevice *dev;
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int count = 0;
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if (!entry)
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return -ENOSPC;
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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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if (!device_active(dev))
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continue;
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entry->apic_id = plat->cpu_id;
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entry++;
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count++;
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}
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/* Omit the table if there is only one CPU */
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if (count > 1)
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finish_table(tab, SFI_SIG_CPUS, entry);
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return 0;
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}
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static int sfi_write_apic(struct table_info *tab)
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{
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struct sfi_apic_table_entry *entry = get_entry_start(tab);
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if (!entry)
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return -ENOSPC;
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entry->phys_addr = IO_APIC_ADDR;
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entry++;
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finish_table(tab, SFI_SIG_APIC, entry);
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return 0;
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}
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static int sfi_write_xsdt(struct table_info *tab)
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{
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struct sfi_xsdt_header *entry = get_entry_start(tab);
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if (!entry)
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return -ENOSPC;
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entry->oem_revision = 1;
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entry->creator_id = 1;
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entry->creator_revision = 1;
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entry++;
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finish_table(tab, SFI_SIG_XSDT, entry);
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return 0;
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}
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ulong write_sfi_table(ulong base)
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{
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struct table_info table;
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table.base = base;
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table.ptr = 0;
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table.count = 0;
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sfi_write_cpus(&table);
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sfi_write_apic(&table);
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/*
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* The SFI specification marks the XSDT table as option, but Linux 4.0
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* crashes on start-up when it is not provided.
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*/
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sfi_write_xsdt(&table);
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/* Finally, write out the system header which points to the others */
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sfi_write_system_header(&table);
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return base + table.ptr;
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}
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