mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
bca28f8f6b
Some Exynos-based boards contain secure firmware and must use firmware
operations to set up some hardware.
This patch adds firmware operations for Exynos secure firmware and a way
for board code and device tree to specify that they must be used.
Example of use:
In board code:
...MACHINE_START(...)
/* ... */
.init_early = exynos_firmware_init,
/* ... */
MACHINE_END
In device tree:
/ {
/* ... */
firmware@0203F000 {
compatible = "samsung,secure-firmware";
reg = <0x0203F000 0x1000>;
};
/* ... */
};
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2012 Samsung Electronics.
|
|
* Kyungmin Park <kyungmin.park@samsung.com>
|
|
* Tomasz Figa <t.figa@samsung.com>
|
|
*
|
|
* This program is free software,you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include <asm/firmware.h>
|
|
|
|
#include <mach/map.h>
|
|
|
|
#include "smc.h"
|
|
|
|
static int exynos_do_idle(void)
|
|
{
|
|
exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_cpu_boot(int cpu)
|
|
{
|
|
exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
|
|
{
|
|
void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c + 4*cpu;
|
|
|
|
__raw_writel(boot_addr, boot_reg);
|
|
return 0;
|
|
}
|
|
|
|
static const struct firmware_ops exynos_firmware_ops = {
|
|
.do_idle = exynos_do_idle,
|
|
.set_cpu_boot_addr = exynos_set_cpu_boot_addr,
|
|
.cpu_boot = exynos_cpu_boot,
|
|
};
|
|
|
|
void __init exynos_firmware_init(void)
|
|
{
|
|
if (of_have_populated_dt()) {
|
|
struct device_node *nd;
|
|
const __be32 *addr;
|
|
|
|
nd = of_find_compatible_node(NULL, NULL,
|
|
"samsung,secure-firmware");
|
|
if (!nd)
|
|
return;
|
|
|
|
addr = of_get_address(nd, 0, NULL, NULL);
|
|
if (!addr) {
|
|
pr_err("%s: No address specified.\n", __func__);
|
|
return;
|
|
}
|
|
}
|
|
|
|
pr_info("Running under secure firmware.\n");
|
|
|
|
register_firmware_ops(&exynos_firmware_ops);
|
|
}
|