arch/x86/lib/tables.c

   1 /*
   2  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/sfi.h>
   9 #include <asm/mpspec.h>
  10 #include <asm/smbios.h>
  11 #include <asm/tables.h>
  12 #include <asm/acpi_table.h>
  13
  14 /**
  15  * Function prototype to write a specific configuration table
  16  *
  17  * @addr:       start address to write the table
  18  * @return:     end address of the table
  19  */
  20 typedef u32 (*table_write)(u32 addr);
  21
  22 static table_write table_write_funcs[] = {
  23 #ifdef CONFIG_GENERATE_PIRQ_TABLE
  24         write_pirq_routing_table,
  25 #endif
  26 #ifdef CONFIG_GENERATE_SFI_TABLE
  27         write_sfi_table,
  28 #endif
  29 #ifdef CONFIG_GENERATE_MP_TABLE
  30         write_mp_table,
  31 #endif
  32 #ifdef CONFIG_GENERATE_ACPI_TABLE
  33         write_acpi_tables,
  34 #endif
  35 #ifdef CONFIG_GENERATE_SMBIOS_TABLE
  36         write_smbios_table,
  37 #endif
  38 };
  39
  40 u8 table_compute_checksum(void *v, int len)
  41 {
  42         u8 *bytes = v;
  43         u8 checksum = 0;
  44         int i;
  45
  46         for (i = 0; i < len; i++)
  47                 checksum -= bytes[i];
  48
  49         return checksum;
  50 }
  51
  52 void table_fill_string(char *dest, const char *src, size_t n, char pad)
  53 {
  54         int start, len;
  55         int i;
  56
  57         strncpy(dest, src, n);
  58
  59         /* Fill the remaining bytes with pad */
  60         len = strlen(src);
  61         start = len < n ? len : n;
  62         for (i = start; i < n; i++)
  63                 dest[i] = pad;
  64 }
  65
  66 void write_tables(void)
  67 {
  68         u32 rom_table_start = ROM_TABLE_ADDR;
  69         u32 rom_table_end;
  70         int i;
  71
  72         for (i = 0; i < ARRAY_SIZE(table_write_funcs); i++) {
  73                 rom_table_end = table_write_funcs[i](rom_table_start);
  74                 rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN);
  75                 rom_table_start = rom_table_end;
  76         }
  77 }