mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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be093beb60
OMAP wishes to pass state to the boot loader upon reboot in order to instruct it whether to wait for USB-based reflashing or not. There is already a facility to do this via the reboot() syscall, except we ignore the string passed to machine_restart(). This patch fixes things to pass this string to arch_reset(). This means that we keep the reboot mode limited to telling the kernel _how_ to perform the reboot which should be independent of what we request the boot loader to do. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
162 lines
3.4 KiB
C
162 lines
3.4 KiB
C
/*
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* linux/arch/arm/mach-shark/arch.c
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*
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* Architecture specific stuff.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/sched.h>
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#include <linux/serial_8250.h>
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#include <linux/io.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/leds.h>
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#include <asm/param.h>
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#include <asm/mach/map.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#define IO_BASE 0xe0000000
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#define IO_SIZE 0x08000000
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#define IO_START 0x40000000
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#define ROMCARD_SIZE 0x08000000
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#define ROMCARD_START 0x10000000
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void arch_reset(char mode, const char *cmd)
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{
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short temp;
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local_irq_disable();
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/* Reset the Machine via pc[3] of the sequoia chipset */
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outw(0x09,0x24);
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temp=inw(0x26);
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temp = temp | (1<<3) | (1<<10);
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outw(0x09,0x24);
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outw(temp,0x26);
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}
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static struct plat_serial8250_port serial_platform_data[] = {
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{
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.iobase = 0x3f8,
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.irq = 4,
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.uartclk = 1843200,
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.regshift = 0,
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.iotype = UPIO_PORT,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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},
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{
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.iobase = 0x2f8,
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.irq = 3,
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.uartclk = 1843200,
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.regshift = 0,
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.iotype = UPIO_PORT,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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},
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{ },
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};
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static struct platform_device serial_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = serial_platform_data,
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},
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};
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static struct resource rtc_resources[] = {
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[0] = {
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.start = 0x70,
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.end = 0x73,
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.flags = IORESOURCE_IO,
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},
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[1] = {
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.start = IRQ_ISA_RTC_ALARM,
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.end = IRQ_ISA_RTC_ALARM,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct platform_device rtc_device = {
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.name = "rtc_cmos",
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.id = -1,
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.resource = rtc_resources,
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.num_resources = ARRAY_SIZE(rtc_resources),
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};
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static int __init shark_init(void)
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{
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int ret;
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if (machine_is_shark())
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{
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ret = platform_device_register(&rtc_device);
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if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret);
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ret = platform_device_register(&serial_device);
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if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret);
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}
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return 0;
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}
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arch_initcall(shark_init);
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extern void shark_init_irq(void);
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static struct map_desc shark_io_desc[] __initdata = {
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{
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.virtual = IO_BASE,
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.pfn = __phys_to_pfn(IO_START),
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.length = IO_SIZE,
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.type = MT_DEVICE
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}
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};
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static void __init shark_map_io(void)
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{
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iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
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}
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#define IRQ_TIMER 0
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#define HZ_TIME ((1193180 + HZ/2) / HZ)
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static irqreturn_t
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shark_timer_interrupt(int irq, void *dev_id)
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{
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timer_tick();
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return IRQ_HANDLED;
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}
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static struct irqaction shark_timer_irq = {
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.name = "Shark Timer Tick",
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.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
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.handler = shark_timer_interrupt,
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};
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/*
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* Set up timer interrupt, and return the current time in seconds.
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*/
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static void __init shark_timer_init(void)
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{
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outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */
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outb(HZ_TIME & 0xff, 0x40); /* LSB of count */
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outb(HZ_TIME >> 8, 0x40);
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setup_irq(IRQ_TIMER, &shark_timer_irq);
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}
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static struct sys_timer shark_timer = {
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.init = shark_timer_init,
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};
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MACHINE_START(SHARK, "Shark")
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/* Maintainer: Alexander Schulz */
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.phys_io = 0x40000000,
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.io_pg_offst = ((0xe0000000) >> 18) & 0xfffc,
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.boot_params = 0x08003000,
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.map_io = shark_map_io,
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.init_irq = shark_init_irq,
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.timer = &shark_timer,
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MACHINE_END
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