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/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <vbe.h>
#include <asm/acpi_s3.h>
#include <asm/coreboot_tables.h>
#include <asm/e820.h>
DECLARE_GLOBAL_DATA_PTR;
int high_table_reserve(void)
{
/* adjust stack pointer to reserve space for configuration tables */
gd->arch.high_table_limit = gd->start_addr_sp;
gd->start_addr_sp -= CONFIG_HIGH_TABLE_SIZE;
gd->arch.high_table_ptr = gd->start_addr_sp;
/* clear the memory */
#ifdef CONFIG_HAVE_ACPI_RESUME
if (gd->arch.prev_sleep_state != ACPI_S3)
#endif
memset((void *)gd->arch.high_table_ptr, 0,
CONFIG_HIGH_TABLE_SIZE);
gd->start_addr_sp &= ~0xf;
return 0;
}
void *high_table_malloc(size_t bytes)
{
u32 new_ptr;
void *ptr;
new_ptr = gd->arch.high_table_ptr + bytes;
if (new_ptr >= gd->arch.high_table_limit)
return NULL;
ptr = (void *)gd->arch.high_table_ptr;
gd->arch.high_table_ptr = new_ptr;
return ptr;
}
/**
* cb_table_init() - initialize a coreboot table header
*
* This fills in the coreboot table header signature and the header bytes.
* Other fields are set to zero.
*
* @cbh: coreboot table header address
*/
static void cb_table_init(struct cb_header *cbh)
{
memset(cbh, 0, sizeof(struct cb_header));
memcpy(cbh->signature, "LBIO", 4);
cbh->header_bytes = sizeof(struct cb_header);
}
/**
* cb_table_add_entry() - add a coreboot table entry
*
* This increases the coreboot table entry size with added table entry length
* and increases entry count by 1.
*
* @cbh: coreboot table header address
* @cbr: to be added table entry address
* @return: pointer to next table entry address
*/
static u32 cb_table_add_entry(struct cb_header *cbh, struct cb_record *cbr)
{
cbh->table_bytes += cbr->size;
cbh->table_entries++;
return (u32)cbr + cbr->size;
}
/**
* cb_table_finalize() - finalize the coreboot table
*
* This calculates the checksum for all coreboot table entries as well as
* the checksum for the coreboot header itself.
*
* @cbh: coreboot table header address
*/
static void cb_table_finalize(struct cb_header *cbh)
{
struct cb_record *cbr = (struct cb_record *)(cbh + 1);
cbh->table_checksum = compute_ip_checksum(cbr, cbh->table_bytes);
cbh->header_checksum = compute_ip_checksum(cbh, cbh->header_bytes);
}
void write_coreboot_table(u32 addr, struct memory_area *cfg_tables)
{
struct cb_header *cbh = (struct cb_header *)addr;
struct cb_record *cbr;
struct cb_memory *mem;
struct cb_memory_range *map;
struct e820_entry e820[32];
struct cb_framebuffer *fb;
struct vesa_mode_info *vesa;
int i, num;
cb_table_init(cbh);
cbr = (struct cb_record *)(cbh + 1);
/*
* Two type of coreboot table entries are generated by us.
* They are 'struct cb_memory' and 'struct cb_framebuffer'.
*/
/* populate memory map table */
mem = (struct cb_memory *)cbr;
mem->tag = CB_TAG_MEMORY;
map = mem->map;
/* first install e820 defined memory maps */
num = install_e820_map(ARRAY_SIZE(e820), e820);
for (i = 0; i < num; i++) {
map->start.lo = e820[i].addr & 0xffffffff;
map->start.hi = e820[i].addr >> 32;
map->size.lo = e820[i].size & 0xffffffff;
map->size.hi = e820[i].size >> 32;
map->type = e820[i].type;
map++;
}
/* then install all configuration tables */
while (cfg_tables->size) {
map->start.lo = cfg_tables->start & 0xffffffff;
map->start.hi = cfg_tables->start >> 32;
map->size.lo = cfg_tables->size & 0xffffffff;
map->size.hi = cfg_tables->size >> 32;
map->type = CB_MEM_TABLE;
map++;
num++;
cfg_tables++;
}
mem->size = num * sizeof(struct cb_memory_range) +
sizeof(struct cb_record);
cbr = (struct cb_record *)cb_table_add_entry(cbh, cbr);
/* populate framebuffer table if we have sane vesa info */
vesa = &mode_info.vesa;
if (vesa->x_resolution && vesa->y_resolution) {
fb = (struct cb_framebuffer *)cbr;
fb->tag = CB_TAG_FRAMEBUFFER;
fb->size = sizeof(struct cb_framebuffer);
fb->x_resolution = vesa->x_resolution;
fb->y_resolution = vesa->y_resolution;
fb->bits_per_pixel = vesa->bits_per_pixel;
fb->bytes_per_line = vesa->bytes_per_scanline;
fb->physical_address = vesa->phys_base_ptr;
fb->red_mask_size = vesa->red_mask_size;
fb->red_mask_pos = vesa->red_mask_pos;
fb->green_mask_size = vesa->green_mask_size;
fb->green_mask_pos = vesa->green_mask_pos;
fb->blue_mask_size = vesa->blue_mask_size;
fb->blue_mask_pos = vesa->blue_mask_pos;
fb->reserved_mask_size = vesa->reserved_mask_size;
fb->reserved_mask_pos = vesa->reserved_mask_pos;
cbr = (struct cb_record *)cb_table_add_entry(cbh, cbr);
}
cb_table_finalize(cbh);
}
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