mirror of
https://github.com/AsahiLinux/u-boot
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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>
207 lines
4.1 KiB
C
207 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2017 Intel Corporation
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*/
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#include <common.h>
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#include <asm/e820.h>
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#include <asm/global_data.h>
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#include <asm/sfi.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* SFI tables are part of the first stage bootloader.
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*
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* U-Boot finds the System Table by searching 16-byte boundaries between
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* physical address 0x000E0000 and 0x000FFFFF. U-Boot shall search this region
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* starting at the low address and shall stop searching when the 1st valid SFI
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* System Table is found.
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*/
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#define SFI_BASE_ADDR 0x000E0000
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#define SFI_LENGTH 0x00020000
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#define SFI_TABLE_LENGTH 16
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static int sfi_table_check(struct sfi_table_header *sbh)
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{
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char chksum = 0;
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char *pos = (char *)sbh;
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u32 i;
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if (sbh->len < SFI_TABLE_LENGTH)
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return -ENXIO;
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if (sbh->len > SFI_LENGTH)
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return -ENXIO;
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for (i = 0; i < sbh->len; i++)
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chksum += *pos++;
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if (chksum)
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pr_err("sfi: Invalid checksum\n");
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/* Checksum is OK if zero */
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return chksum ? -EILSEQ : 0;
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}
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static int sfi_table_is_type(struct sfi_table_header *sbh, const char *signature)
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{
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return !strncmp(sbh->sig, signature, SFI_SIGNATURE_SIZE) &&
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!sfi_table_check(sbh);
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}
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static struct sfi_table_simple *sfi_get_table_by_sig(unsigned long addr,
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const char *signature)
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{
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struct sfi_table_simple *sb;
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u32 i;
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for (i = 0; i < SFI_LENGTH; i += SFI_TABLE_LENGTH) {
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sb = (struct sfi_table_simple *)(addr + i);
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if (sfi_table_is_type(&sb->header, signature))
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return sb;
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}
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return NULL;
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}
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static struct sfi_table_simple *sfi_search_mmap(void)
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{
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struct sfi_table_header *sbh;
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struct sfi_table_simple *sb;
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u32 sys_entry_cnt;
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u32 i;
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/* Find SYST table */
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sb = sfi_get_table_by_sig(SFI_BASE_ADDR, SFI_SIG_SYST);
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if (!sb) {
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pr_err("sfi: failed to locate SYST table\n");
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return NULL;
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}
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sys_entry_cnt = (sb->header.len - sizeof(*sbh)) / 8;
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/* Search through each SYST entry for MMAP table */
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for (i = 0; i < sys_entry_cnt; i++) {
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sbh = (struct sfi_table_header *)(unsigned long)sb->pentry[i];
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if (sfi_table_is_type(sbh, SFI_SIG_MMAP))
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return (struct sfi_table_simple *)sbh;
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}
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pr_err("sfi: failed to locate SFI MMAP table\n");
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return NULL;
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}
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#define sfi_for_each_mentry(i, sb, mentry) \
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for (i = 0, mentry = (struct sfi_mem_entry *)sb->pentry; \
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i < SFI_GET_NUM_ENTRIES(sb, struct sfi_mem_entry); \
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i++, mentry++) \
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static unsigned int sfi_setup_e820(unsigned int max_entries,
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struct e820_entry *entries)
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{
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struct sfi_table_simple *sb;
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struct sfi_mem_entry *mentry;
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unsigned long long start, end, size;
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int type, total = 0;
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u32 i;
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sb = sfi_search_mmap();
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if (!sb)
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return 0;
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sfi_for_each_mentry(i, sb, mentry) {
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start = mentry->phys_start;
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size = mentry->pages << 12;
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end = start + size;
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if (start > end)
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continue;
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/* translate SFI mmap type to E820 map type */
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switch (mentry->type) {
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case SFI_MEM_CONV:
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type = E820_RAM;
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break;
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case SFI_MEM_UNUSABLE:
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case SFI_RUNTIME_SERVICE_DATA:
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continue;
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default:
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type = E820_RESERVED;
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}
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if (total == E820MAX)
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break;
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entries[total].addr = start;
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entries[total].size = size;
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entries[total].type = type;
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total++;
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}
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return total;
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}
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static int sfi_get_bank_size(void)
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{
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struct sfi_table_simple *sb;
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struct sfi_mem_entry *mentry;
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int bank = 0;
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u32 i;
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sb = sfi_search_mmap();
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if (!sb)
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return 0;
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sfi_for_each_mentry(i, sb, mentry) {
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if (mentry->type != SFI_MEM_CONV)
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continue;
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gd->bd->bi_dram[bank].start = mentry->phys_start;
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gd->bd->bi_dram[bank].size = mentry->pages << 12;
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bank++;
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}
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return bank;
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}
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static phys_size_t sfi_get_ram_size(void)
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{
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struct sfi_table_simple *sb;
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struct sfi_mem_entry *mentry;
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phys_size_t ram = 0;
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u32 i;
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sb = sfi_search_mmap();
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if (!sb)
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return 0;
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sfi_for_each_mentry(i, sb, mentry) {
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if (mentry->type != SFI_MEM_CONV)
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continue;
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ram += mentry->pages << 12;
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}
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debug("sfi: RAM size %llu\n", ram);
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return ram;
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}
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unsigned int install_e820_map(unsigned int max_entries,
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struct e820_entry *entries)
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{
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return sfi_setup_e820(max_entries, entries);
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}
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int dram_init_banksize(void)
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{
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sfi_get_bank_size();
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return 0;
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}
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int dram_init(void)
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{
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gd->ram_size = sfi_get_ram_size();
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return 0;
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}
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