https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 52addcf9d6669fa439387610bc65c92fa0980cef authored by Linus Torvalds on 25 August 2014, 22:36:20 UTC
Linux 3.17-rc2
Linux 3.17-rc2
Tip revision: 52addcf
firmware.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 "common.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)
{
/*
* Exynos3250 doesn't need to send smc command for secondary CPU boot
* because Exynos3250 removes WFE in secure mode.
*/
if (soc_is_exynos3250())
return 0;
/*
* The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
* But, Exynos4212 has only one secondary CPU so second parameter
* isn't used for informing secure firmware about CPU id.
*/
if (soc_is_exynos4212())
cpu = 0;
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;
if (!sysram_ns_base_addr)
return -ENODEV;
boot_reg = sysram_ns_base_addr + 0x1c;
/*
* Almost all Exynos-series of SoCs that run in secure mode don't need
* additional offset for every CPU, with Exynos4412 being the only
* exception.
*/
if (soc_is_exynos4412())
boot_reg += 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)
{
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);
}