mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 06:12:58 +00:00
971ccee2fb
KASLR address is needed to boot fully functional Android. KASLR is set by primary bootloader, and since u-boot is used as a secondary bootloader(replacing kernel) on sdm845 platform, KASLR may be found by comparing memory chunks at relocaddr over supposed KASLR range. Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Common init part for boards based on SDM845
|
|
*
|
|
* (C) Copyright 2021 Dzmitry Sankouski <dsankouski@gmail.com>
|
|
*/
|
|
|
|
#include <init.h>
|
|
#include <env.h>
|
|
#include <common.h>
|
|
#include <asm/system.h>
|
|
#include <asm/gpio.h>
|
|
#include <dm.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
int dram_init(void)
|
|
{
|
|
return fdtdec_setup_mem_size_base();
|
|
}
|
|
|
|
void reset_cpu(void)
|
|
{
|
|
psci_system_reset();
|
|
}
|
|
|
|
__weak int board_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Check for vol- and power buttons */
|
|
__weak int misc_init_r(void)
|
|
{
|
|
struct udevice *pon;
|
|
struct gpio_desc resin;
|
|
int node, ret;
|
|
|
|
ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8998_pon@800", &pon);
|
|
if (ret < 0) {
|
|
printf("Failed to find PMIC pon node. Check device tree\n");
|
|
return 0;
|
|
}
|
|
|
|
node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
|
|
"key_vol_down");
|
|
if (node < 0) {
|
|
printf("Failed to find key_vol_down node. Check device tree\n");
|
|
return 0;
|
|
}
|
|
if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0,
|
|
&resin, 0)) {
|
|
printf("Failed to request key_vol_down button.\n");
|
|
return 0;
|
|
}
|
|
if (dm_gpio_get_value(&resin)) {
|
|
env_set("key_vol_down", "1");
|
|
printf("Volume down button pressed\n");
|
|
} else {
|
|
env_set("key_vol_down", "0");
|
|
}
|
|
|
|
node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
|
|
"key_power");
|
|
if (node < 0) {
|
|
printf("Failed to find key_power node. Check device tree\n");
|
|
return 0;
|
|
}
|
|
if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0,
|
|
&resin, 0)) {
|
|
printf("Failed to request key_power button.\n");
|
|
return 0;
|
|
}
|
|
if (dm_gpio_get_value(&resin)) {
|
|
env_set("key_power", "1");
|
|
printf("Power button pressed\n");
|
|
} else {
|
|
env_set("key_power", "0");
|
|
}
|
|
|
|
/*
|
|
* search for kaslr address, set by primary bootloader by searching first
|
|
* 0x100 relocated bytes at u-boot's initial load address range
|
|
*/
|
|
uintptr_t start = gd->ram_base;
|
|
uintptr_t end = start + 0x800000;
|
|
u8 *addr = (u8 *)start;
|
|
phys_addr_t *relocaddr = (phys_addr_t *)gd->relocaddr;
|
|
u32 block_size = 0x1000;
|
|
|
|
while (memcmp(addr, relocaddr, 0x100) && (uintptr_t)addr < end)
|
|
addr += block_size;
|
|
|
|
if ((uintptr_t)addr >= end)
|
|
printf("KASLR not found in range 0x%lx - 0x%lx", start, end);
|
|
else
|
|
env_set_addr("KASLR", addr);
|
|
|
|
return 0;
|
|
}
|