diff options
Diffstat (limited to 'arch/arm64/kernel')
-rw-r--r-- | arch/arm64/kernel/early_printk.c | 35 | ||||
-rw-r--r-- | arch/arm64/kernel/irq.c | 19 | ||||
-rw-r--r-- | arch/arm64/kernel/process.c | 8 | ||||
-rw-r--r-- | arch/arm64/kernel/setup.c | 8 |
4 files changed, 56 insertions, 14 deletions
diff --git a/arch/arm64/kernel/early_printk.c b/arch/arm64/kernel/early_printk.c index 7e320a2edb9..ac974f48a7a 100644 --- a/arch/arm64/kernel/early_printk.c +++ b/arch/arm64/kernel/early_printk.c @@ -24,6 +24,7 @@ #include <linux/io.h> #include <linux/amba/serial.h> +#include <linux/serial_reg.h> static void __iomem *early_base; static void (*printch)(char ch); @@ -40,6 +41,37 @@ static void pl011_printch(char ch) ; } +/* + * Semihosting-based debug console + */ +static void smh_printch(char ch) +{ + asm volatile("mov x1, %0\n" + "mov x0, #3\n" + "hlt 0xf000\n" + : : "r" (&ch) : "x0", "x1", "memory"); +} + +/* + * 8250/16550 (8-bit aligned registers) single character TX. + */ +static void uart8250_8bit_printch(char ch) +{ + while (!(readb_relaxed(early_base + UART_LSR) & UART_LSR_THRE)) + ; + writeb_relaxed(ch, early_base + UART_TX); +} + +/* + * 8250/16550 (32-bit aligned registers) single character TX. + */ +static void uart8250_32bit_printch(char ch) +{ + while (!(readl_relaxed(early_base + (UART_LSR << 2)) & UART_LSR_THRE)) + ; + writel_relaxed(ch, early_base + (UART_TX << 2)); +} + struct earlycon_match { const char *name; void (*printch)(char ch); @@ -47,6 +79,9 @@ struct earlycon_match { static const struct earlycon_match earlycon_match[] __initconst = { { .name = "pl011", .printch = pl011_printch, }, + { .name = "smh", .printch = smh_printch, }, + { .name = "uart8250-8bit", .printch = uart8250_8bit_printch, }, + { .name = "uart8250-32bit", .printch = uart8250_32bit_printch, }, {} }; diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c index 0373c6609ea..ecb3354292e 100644 --- a/arch/arm64/kernel/irq.c +++ b/arch/arm64/kernel/irq.c @@ -25,7 +25,7 @@ #include <linux/irq.h> #include <linux/smp.h> #include <linux/init.h> -#include <linux/of_irq.h> +#include <linux/irqchip.h> #include <linux/seq_file.h> #include <linux/ratelimit.h> @@ -67,18 +67,17 @@ void handle_IRQ(unsigned int irq, struct pt_regs *regs) set_irq_regs(old_regs); } -/* - * Interrupt controllers supported by the kernel. - */ -static const struct of_device_id intctrl_of_match[] __initconst = { - /* IRQ controllers { .compatible, .data } info to go here */ - {} -}; +void __init set_handle_irq(void (*handle_irq)(struct pt_regs *)) +{ + if (handle_arch_irq) + return; + + handle_arch_irq = handle_irq; +} void __init init_IRQ(void) { - of_irq_init(intctrl_of_match); - + irqchip_init(); if (!handle_arch_irq) panic("No interrupt controller found."); } diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 0337cdb0667..3fd745104ec 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -81,8 +81,8 @@ void soft_restart(unsigned long addr) void (*pm_power_off)(void); EXPORT_SYMBOL_GPL(pm_power_off); -void (*pm_restart)(const char *cmd); -EXPORT_SYMBOL_GPL(pm_restart); +void (*arm_pm_restart)(char str, const char *cmd); +EXPORT_SYMBOL_GPL(arm_pm_restart); /* @@ -164,8 +164,8 @@ void machine_restart(char *cmd) local_fiq_disable(); /* Now call the architecture specific reboot code. */ - if (pm_restart) - pm_restart(cmd); + if (arm_pm_restart) + arm_pm_restart('h', cmd); /* * Whoops - the architecture was unable to reboot. diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 113db863f83..9c023d714f4 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -32,6 +32,7 @@ #include <linux/kexec.h> #include <linux/crash_dump.h> #include <linux/root_dev.h> +#include <linux/clk-provider.h> #include <linux/cpu.h> #include <linux/interrupt.h> #include <linux/smp.h> @@ -277,6 +278,13 @@ void __init setup_arch(char **cmdline_p) #endif } +static int __init arm64_of_clk_init(void) +{ + of_clk_init(NULL); + return 0; +} +arch_initcall(arm64_of_clk_init); + static DEFINE_PER_CPU(struct cpu, cpu_data); static int __init topology_init(void) |