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: a0d271cbfed1dd50278c6b06bead3d00ba0a88f9 authored by Linus Torvalds on 30 September 2012, 23:47:46 UTC
Linux 3.6
Linux 3.6
Tip revision: a0d271c
reset.c
/*
* arch/arm/mach-tegra/reset.c
*
* Copyright (C) 2011,2012 NVIDIA Corporation.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/cpumask.h>
#include <linux/bitops.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <mach/iomap.h>
#include <mach/irammap.h>
#include "reset.h"
#include "fuse.h"
#define TEGRA_IRAM_RESET_BASE (TEGRA_IRAM_BASE + \
TEGRA_IRAM_RESET_HANDLER_OFFSET)
static bool is_enabled;
static void __init tegra_cpu_reset_handler_enable(void)
{
void __iomem *iram_base = IO_ADDRESS(TEGRA_IRAM_RESET_BASE);
void __iomem *evp_cpu_reset =
IO_ADDRESS(TEGRA_EXCEPTION_VECTORS_BASE + 0x100);
void __iomem *sb_ctrl = IO_ADDRESS(TEGRA_SB_BASE);
u32 reg;
BUG_ON(is_enabled);
BUG_ON(tegra_cpu_reset_handler_size > TEGRA_IRAM_RESET_HANDLER_SIZE);
memcpy(iram_base, (void *)__tegra_cpu_reset_handler_start,
tegra_cpu_reset_handler_size);
/*
* NOTE: This must be the one and only write to the EVP CPU reset
* vector in the entire system.
*/
writel(TEGRA_IRAM_RESET_BASE + tegra_cpu_reset_handler_offset,
evp_cpu_reset);
wmb();
reg = readl(evp_cpu_reset);
/*
* Prevent further modifications to the physical reset vector.
* NOTE: Has no effect on chips prior to Tegra30.
*/
if (tegra_chip_id != TEGRA20) {
reg = readl(sb_ctrl);
reg |= 2;
writel(reg, sb_ctrl);
wmb();
}
is_enabled = true;
}
void __init tegra_cpu_reset_handler_init(void)
{
#ifdef CONFIG_SMP
__tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_PRESENT] =
*((u32 *)cpu_present_mask);
__tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_SECONDARY] =
virt_to_phys((void *)tegra_secondary_startup);
#endif
tegra_cpu_reset_handler_enable();
}