diff options
| -rw-r--r-- | arch/mips/Kconfig | 7 | ||||
| -rw-r--r-- | arch/mips/include/asm/irq.h | 5 | ||||
| -rw-r--r-- | arch/mips/include/asm/prom.h | 35 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/prom.c | 112 | ||||
| -rw-r--r-- | arch/mips/kernel/setup.c | 2 |
6 files changed, 163 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 3ad59dde4852..21c75a89496a 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2107,6 +2107,13 @@ config SECCOMP If unsure, say Y. Only embedded should say N here. +config USE_OF + bool "Flattened Device Tree support" + select OF + select OF_FLATTREE + help + Include support for flattened device tree machine descriptions. + endmenu config LOCKDEP_SUPPORT diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h index dea4aed6478f..b003ed52ed17 100644 --- a/arch/mips/include/asm/irq.h +++ b/arch/mips/include/asm/irq.h @@ -16,6 +16,11 @@ #include <irq.h> +static inline void irq_dispose_mapping(unsigned int virq) +{ + return; +} + #ifdef CONFIG_I8259 static inline int irq_canonicalize(int irq) { diff --git a/arch/mips/include/asm/prom.h b/arch/mips/include/asm/prom.h new file mode 100644 index 000000000000..23f8237e18bb --- /dev/null +++ b/arch/mips/include/asm/prom.h @@ -0,0 +1,35 @@ +/* + * arch/mips/include/asm/prom.h + * + * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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. + * + */ +#ifndef __ASM_MIPS_PROM_H +#define __ASM_MIPS_PROM_H + +#ifdef CONFIG_OF +#include <linux/init.h> + +#include <asm/setup.h> +#include <asm/irq.h> +#include <asm/bootinfo.h> + +/* which is compatible with the flattened device tree (FDT) */ +#define cmd_line arcs_cmdline + +extern int early_init_dt_scan_memory_arch(unsigned long node, + const char *uname, int depth, void *data); + +extern int reserve_mem_mach(unsigned long addr, unsigned long size); +extern void free_mem_mach(unsigned long addr, unsigned long size); + +extern void __init device_tree_init(void); +#else /* CONFIG_OF */ +static inline void __init device_tree_init(void) { } +#endif /* CONFIG_OF */ + +#endif /* _ASM_MIPS_PROM_H */ diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 06f848299785..80884983270d 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -96,6 +96,8 @@ obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o +obj-$(CONFIG_OF) += prom.o + CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c new file mode 100644 index 000000000000..e000b278f024 --- /dev/null +++ b/arch/mips/kernel/prom.c @@ -0,0 +1,112 @@ +/* + * MIPS support for CONFIG_OF device tree support + * + * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/bootmem.h> +#include <linux/initrd.h> +#include <linux/debugfs.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> + +#include <asm/page.h> +#include <asm/prom.h> + +int __init early_init_dt_scan_memory_arch(unsigned long node, + const char *uname, int depth, + void *data) +{ + return early_init_dt_scan_memory(node, uname, depth, data); +} + +void __init early_init_dt_add_memory_arch(u64 base, u64 size) +{ + return add_memory_region(base, size, BOOT_MEM_RAM); +} + +int __init reserve_mem_mach(unsigned long addr, unsigned long size) +{ + return reserve_bootmem(addr, size, BOOTMEM_DEFAULT); +} + +void __init free_mem_mach(unsigned long addr, unsigned long size) +{ + return free_bootmem(addr, size); +} + +u64 __init early_init_dt_alloc_memory_arch(u64 size, u64 align) +{ + return virt_to_phys( + __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)) + ); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void __init early_init_dt_setup_initrd_arch(unsigned long start, + unsigned long end) +{ + initrd_start = (unsigned long)__va(start); + initrd_end = (unsigned long)__va(end); + initrd_below_start_ok = 1; +} +#endif + +/* + * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq# + * + * Currently the mapping mechanism is trivial; simple flat hwirq numbers are + * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not + * supported. + */ +unsigned int irq_create_of_mapping(struct device_node *controller, + const u32 *intspec, unsigned int intsize) +{ + return intspec[0]; +} +EXPORT_SYMBOL_GPL(irq_create_of_mapping); + +void __init early_init_devtree(void *params) +{ + /* Setup flat device-tree pointer */ + initial_boot_params = params; + + /* Retrieve various informations from the /chosen node of the + * device-tree, including the platform type, initrd location and + * size, and more ... + */ + of_scan_flat_dt(early_init_dt_scan_chosen, NULL); + + /* Scan memory nodes */ + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL); +} + +void __init device_tree_init(void) +{ + unsigned long base, size; + + if (!initial_boot_params) + return; + + base = virt_to_phys((void *)initial_boot_params); + size = initial_boot_params->totalsize; + + /* Before we do anything, lets reserve the dt blob */ + reserve_mem_mach(base, size); + + unflatten_device_tree(); + + /* free the space reserved for the dt blob */ + free_mem_mach(base, size); +} diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 85aef3fc6716..a6b900f2962b 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -31,6 +31,7 @@ #include <asm/setup.h> #include <asm/smp-ops.h> #include <asm/system.h> +#include <asm/prom.h> struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; @@ -487,6 +488,7 @@ static void __init arch_mem_init(char **cmdline_p) } bootmem_init(); + device_tree_init(); sparse_init(); paging_init(); } |