867bcb63e7
Implement write_acpi_table() to create a minimal working ACPI table. This includes writing FACS, XSDT, RSDP, FADT, MCFG, MADT, DSDT & SSDT ACPI table entries. Use a Kconfig option GENERATE_ACPI_TABLE to tell U-Boot whether we need actually write the APCI table just like we did for PIRQ routing, MP table and SFI tables. With ACPI table existence, linux kernel gets control of power management, thermal management, configuration management and monitoring in hardware. Signed-off-by: Saket Sinha <saket.sinha89@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tidied up whitespace and aligned some tabs: Signed-off-by: Simon Glass <sjg@chromium.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/sfi.h>
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#include <asm/mpspec.h>
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#include <asm/tables.h>
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#include <asm/acpi_table.h>
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u8 table_compute_checksum(void *v, int len)
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{
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u8 *bytes = v;
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u8 checksum = 0;
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int i;
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for (i = 0; i < len; i++)
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checksum -= bytes[i];
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return checksum;
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}
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void table_fill_string(char *dest, const char *src, size_t n, char pad)
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{
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int start, len;
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int i;
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strncpy(dest, src, n);
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/* Fill the remaining bytes with pad */
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len = strlen(src);
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start = len < n ? len : n;
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for (i = start; i < n; i++)
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dest[i] = pad;
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}
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void write_tables(void)
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{
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u32 __maybe_unused rom_table_end = ROM_TABLE_ADDR;
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#ifdef CONFIG_GENERATE_PIRQ_TABLE
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rom_table_end = write_pirq_routing_table(rom_table_end);
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rom_table_end = ALIGN(rom_table_end, 1024);
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#endif
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#ifdef CONFIG_GENERATE_SFI_TABLE
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rom_table_end = write_sfi_table(rom_table_end);
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rom_table_end = ALIGN(rom_table_end, 1024);
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#endif
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#ifdef CONFIG_GENERATE_MP_TABLE
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rom_table_end = write_mp_table(rom_table_end);
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rom_table_end = ALIGN(rom_table_end, 1024);
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#endif
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#ifdef CONFIG_GENERATE_ACPI_TABLE
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rom_table_end = write_acpi_tables(rom_table_end);
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rom_table_end = ALIGN(rom_table_end, 1024);
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#endif
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}
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