mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-03 22:16:48 +07:00
7ed76e089a
Presently, using exynos_defconfig with CONFIG_DEBUG_LL and CONFIG_EARLY_PRIN on, kernel is not booting, we are getting following: [ 0.000000] ------------[ cut here ]------------ [ 0.000000] kernel BUG at mm/vmalloc.c:1134! [ 0.000000] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.11.0-rc1 #633 [ 0.000000] task: c052ec48 ti: c0524000 task.ti: c0524000 [ 0.000000] PC is at vm_area_add_early+0x54/0x94 [ 0.000000] LR is at add_static_vm_early+0xc/0x60 Its because exynos[4/5]_map_io() function ioremaps a single 512KB memory size for all the four uart ports which envelopes the mapping created by debug_ll_io_init(), called earlier in exynos_init_io(). This patch removes iodesc entries for UART controller for all Samsung SoC's, since now the Samsung uart driver does a ioremap during probe and any needed iomapping for earlyprintk will be handled by debug_ll_io_init(). Tested on smdk4412 and smdk5250. Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
411 lines
9.7 KiB
C
411 lines
9.7 KiB
C
/*
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* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Common Codes for EXYNOS
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqchip.h>
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#include <linux/io.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include <clocksource/samsung_pwm.h>
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#include <linux/sched.h>
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#include <linux/serial_core.h>
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#include <linux/of.h>
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#include <linux/of_fdt.h>
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#include <linux/of_irq.h>
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#include <linux/export.h>
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#include <linux/irqdomain.h>
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#include <linux/of_address.h>
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#include <linux/clocksource.h>
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#include <linux/clk-provider.h>
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#include <linux/irqchip/arm-gic.h>
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#include <linux/irqchip/chained_irq.h>
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#include <asm/proc-fns.h>
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#include <asm/exception.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/cacheflush.h>
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#include <mach/regs-irq.h>
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#include <mach/regs-pmu.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/regs-serial.h>
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#include "common.h"
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#define L2_AUX_VAL 0x7C470001
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#define L2_AUX_MASK 0xC200ffff
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static const char name_exynos4210[] = "EXYNOS4210";
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static const char name_exynos4212[] = "EXYNOS4212";
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static const char name_exynos4412[] = "EXYNOS4412";
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static const char name_exynos5250[] = "EXYNOS5250";
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static const char name_exynos5420[] = "EXYNOS5420";
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static const char name_exynos5440[] = "EXYNOS5440";
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static void exynos4_map_io(void);
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static void exynos5_map_io(void);
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static int exynos_init(void);
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static struct cpu_table cpu_ids[] __initdata = {
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{
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.idcode = EXYNOS4210_CPU_ID,
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.idmask = EXYNOS4_CPU_MASK,
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.map_io = exynos4_map_io,
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.init = exynos_init,
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.name = name_exynos4210,
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}, {
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.idcode = EXYNOS4212_CPU_ID,
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.idmask = EXYNOS4_CPU_MASK,
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.map_io = exynos4_map_io,
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.init = exynos_init,
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.name = name_exynos4212,
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}, {
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.idcode = EXYNOS4412_CPU_ID,
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.idmask = EXYNOS4_CPU_MASK,
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.map_io = exynos4_map_io,
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.init = exynos_init,
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.name = name_exynos4412,
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}, {
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.idcode = EXYNOS5250_SOC_ID,
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.idmask = EXYNOS5_SOC_MASK,
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.map_io = exynos5_map_io,
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.init = exynos_init,
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.name = name_exynos5250,
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}, {
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.idcode = EXYNOS5420_SOC_ID,
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.idmask = EXYNOS5_SOC_MASK,
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.map_io = exynos5_map_io,
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.init = exynos_init,
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.name = name_exynos5420,
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}, {
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.idcode = EXYNOS5440_SOC_ID,
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.idmask = EXYNOS5_SOC_MASK,
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.init = exynos_init,
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.name = name_exynos5440,
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},
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};
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/* Initial IO mappings */
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static struct map_desc exynos4_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S3C_VA_SYS,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S3C_VA_TIMER,
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.pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
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.length = SZ_16K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S3C_VA_WATCHDOG,
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.pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_SROMC,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_SYSTIMER,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_PMU,
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.pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_COMBINER_BASE,
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.pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_GIC_CPU,
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.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_GIC_DIST,
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.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_CMU,
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.pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
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.length = SZ_128K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_COREPERI_BASE,
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.pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
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.length = SZ_8K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_L2CC,
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.pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_DMC0,
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.pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_DMC1,
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.pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S3C_VA_USB_HSPHY,
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.pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos4_iodesc0[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SYSRAM,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos4_iodesc1[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SYSRAM,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos4210_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
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.pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos4x12_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
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.pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos5250_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
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.pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS),
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.length = SZ_4K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos5_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S3C_VA_SYS,
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.pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S3C_VA_TIMER,
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.pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
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.length = SZ_16K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S3C_VA_WATCHDOG,
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.pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_SROMC,
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.pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_SYSRAM,
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.pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_CMU,
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.pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
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.length = 144 * SZ_1K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_PMU,
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.pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
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.length = SZ_64K,
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.type = MT_DEVICE,
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},
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};
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void exynos4_restart(enum reboot_mode mode, const char *cmd)
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{
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__raw_writel(0x1, S5P_SWRESET);
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}
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void exynos5_restart(enum reboot_mode mode, const char *cmd)
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{
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struct device_node *np;
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u32 val;
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void __iomem *addr;
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val = 0x1;
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addr = EXYNOS_SWRESET;
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if (of_machine_is_compatible("samsung,exynos5440")) {
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u32 status;
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np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
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addr = of_iomap(np, 0) + 0xbc;
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status = __raw_readl(addr);
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addr = of_iomap(np, 0) + 0xcc;
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val = __raw_readl(addr);
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val = (val & 0xffff0000) | (status & 0xffff);
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}
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__raw_writel(val, addr);
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}
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void __init exynos_init_late(void)
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{
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if (of_machine_is_compatible("samsung,exynos5440"))
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/* to be supported later */
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return;
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exynos_pm_late_initcall();
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}
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static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
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int depth, void *data)
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{
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struct map_desc iodesc;
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__be32 *reg;
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unsigned long len;
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if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
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!of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
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return 0;
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reg = of_get_flat_dt_prop(node, "reg", &len);
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if (reg == NULL || len != (sizeof(unsigned long) * 2))
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return 0;
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iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
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iodesc.length = be32_to_cpu(reg[1]) - 1;
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iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
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iodesc.type = MT_DEVICE;
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iotable_init(&iodesc, 1);
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return 1;
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}
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/*
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* exynos_map_io
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*
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* register the standard cpu IO areas
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*/
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void __init exynos_init_io(void)
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{
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debug_ll_io_init();
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of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
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/* detect cpu id and rev. */
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s5p_init_cpu(S5P_VA_CHIPID);
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s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
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}
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static void __init exynos4_map_io(void)
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{
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iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
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if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
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iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
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else
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iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
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if (soc_is_exynos4210())
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iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
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if (soc_is_exynos4212() || soc_is_exynos4412())
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iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
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}
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static void __init exynos5_map_io(void)
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{
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iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
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if (soc_is_exynos5250())
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iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
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}
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void __init exynos_init_time(void)
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{
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of_clk_init(NULL);
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clocksource_of_init();
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}
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struct bus_type exynos_subsys = {
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.name = "exynos-core",
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.dev_name = "exynos-core",
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};
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static struct device exynos4_dev = {
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.bus = &exynos_subsys,
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};
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static int __init exynos_core_init(void)
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{
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return subsys_system_register(&exynos_subsys, NULL);
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}
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core_initcall(exynos_core_init);
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static int __init exynos4_l2x0_cache_init(void)
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{
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int ret;
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ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
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if (ret)
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return ret;
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l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
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clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
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return 0;
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}
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early_initcall(exynos4_l2x0_cache_init);
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static int __init exynos_init(void)
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{
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printk(KERN_INFO "EXYNOS: Initializing architecture\n");
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return device_register(&exynos4_dev);
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}
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