diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/xtensa/Kconfig | 11 | ||||
| -rw-r--r-- | arch/xtensa/Makefile | 7 | ||||
| -rw-r--r-- | arch/xtensa/boot/Makefile | 11 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/bootparam.h | 1 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/prom.h | 6 | ||||
| -rw-r--r-- | arch/xtensa/kernel/irq.c | 10 | ||||
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 143 |
7 files changed, 164 insertions, 25 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 1816abc5c8d5..8ceb5b2ffbb1 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -178,6 +178,17 @@ config CMDLINE time by entering them here. As a minimum, you should specify the memory size and the root device (e.g., mem=64M root=/dev/nfs). +config USE_OF + bool "Flattened Device Tree support" + select OF + select OF_EARLY_FLATTREE + help + Include support for flattened device tree machine descriptions. + +config BUILTIN_DTB + string "DTB to build into the kernel image" + depends on OF + source "mm/Kconfig" source "drivers/pcmcia/Kconfig" diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile index ab63c9beb930..227f658fc2b9 100644 --- a/arch/xtensa/Makefile +++ b/arch/xtensa/Makefile @@ -79,6 +79,10 @@ core-y += $(buildvar) $(buildplf) libs-y += arch/xtensa/lib/ $(LIBGCC) +ifneq ($(CONFIG_BUILTIN_DTB),"") +core-y += arch/xtensa/boot/ +endif + boot := arch/xtensa/boot all: zImage @@ -88,6 +92,9 @@ bzImage : zImage zImage: vmlinux $(Q)$(MAKE) $(build)=$(boot) $@ +%.dtb: + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + define archhelp @echo '* zImage - Compressed kernel image (arch/xtensa/boot/images/zImage.*)' endef diff --git a/arch/xtensa/boot/Makefile b/arch/xtensa/boot/Makefile index ff974fc2935b..cb5ff4dbdf88 100644 --- a/arch/xtensa/boot/Makefile +++ b/arch/xtensa/boot/Makefile @@ -25,6 +25,17 @@ bootdir-$(CONFIG_XTENSA_PLATFORM_ISS) += boot-elf bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf boot-uboot +BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB)).dtb.o +ifneq ($(CONFIG_BUILTIN_DTB),"") +obj-y += $(BUILTIN_DTB) +endif + +# Rule to build device tree blobs +$(obj)/%.dtb: $(src)/dts/%.dts FORCE + $(call if_changed_dep,dtc) + +clean-files := *.dtb.S + zImage Image: $(bootdir-y) $(bootdir-y): $(addprefix $(obj)/,$(subdir-y)) \ diff --git a/arch/xtensa/include/asm/bootparam.h b/arch/xtensa/include/asm/bootparam.h index 9983f2c1b7ee..057077e96c98 100644 --- a/arch/xtensa/include/asm/bootparam.h +++ b/arch/xtensa/include/asm/bootparam.h @@ -22,6 +22,7 @@ #define BP_TAG_MEMORY 0x1003 /* memory addr and size (bp_meminfo) */ #define BP_TAG_SERIAL_BAUSRATE 0x1004 /* baud rate of current console. */ #define BP_TAG_SERIAL_PORT 0x1005 /* serial device of current console */ +#define BP_TAG_FDT 0x1006 /* flat device tree addr */ #define BP_TAG_FIRST 0x7B0B /* first tag with a version number */ #define BP_TAG_LAST 0x7E0B /* last tag */ diff --git a/arch/xtensa/include/asm/prom.h b/arch/xtensa/include/asm/prom.h new file mode 100644 index 000000000000..f3d7cd2c0de7 --- /dev/null +++ b/arch/xtensa/include/asm/prom.h @@ -0,0 +1,6 @@ +#ifndef _XTENSA_ASM_PROM_H +#define _XTENSA_ASM_PROM_H + +#define HAVE_ARCH_DEVTREE_FIXUPS + +#endif /* _XTENSA_ASM_PROM_H */ diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c index e90d78211195..6f4f9749cff7 100644 --- a/arch/xtensa/kernel/irq.c +++ b/arch/xtensa/kernel/irq.c @@ -19,6 +19,7 @@ #include <linux/irq.h> #include <linux/kernel_stat.h> #include <linux/irqdomain.h> +#include <linux/of.h> #include <asm/uaccess.h> #include <asm/platform.h> @@ -199,8 +200,17 @@ void __init init_IRQ(void) cached_irq_mask = 0; set_sr(~0, intclear); +#ifdef CONFIG_OF + /* The interrupt controller device node is mandatory */ + intc = of_find_compatible_node(NULL, NULL, "xtensa,pic"); + BUG_ON(!intc); + + root_domain = irq_domain_add_linear(intc, NR_IRQS, + &xtensa_irq_domain_ops, NULL); +#else root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0, &xtensa_irq_domain_ops, NULL); +#endif irq_set_default_host(root_domain); variant_init_irq(); diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 45217617c60d..64d80e4b0bd4 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -22,6 +22,11 @@ #include <linux/bootmem.h> #include <linux/kernel.h> +#ifdef CONFIG_OF +#include <linux/of_fdt.h> +#include <linux/of_platform.h> +#endif + #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) # include <linux/console.h> #endif @@ -65,6 +70,11 @@ int initrd_is_mapped = 0; extern int initrd_below_start_ok; #endif +#ifdef CONFIG_OF +extern u32 __dtb_start[]; +void *dtb_start = __dtb_start; +#endif + unsigned char aux_device_present; extern unsigned long loops_per_jiffy; @@ -84,6 +94,8 @@ extern void init_mmu(void); static inline void init_mmu(void) { } #endif +extern int mem_reserve(unsigned long, unsigned long, int); +extern void bootmem_init(void); extern void zones_init(void); /* @@ -105,28 +117,33 @@ typedef struct tagtable { /* parse current tag */ -static int __init parse_tag_mem(const bp_tag_t *tag) +static int __init add_sysmem_bank(unsigned long type, unsigned long start, + unsigned long end) { - meminfo_t *mi = (meminfo_t*)(tag->data); - - if (mi->type != MEMORY_TYPE_CONVENTIONAL) - return -1; - if (sysmem.nr_banks >= SYSMEM_BANKS_MAX) { printk(KERN_WARNING - "Ignoring memory bank 0x%08lx size %ldKB\n", - (unsigned long)mi->start, - (unsigned long)mi->end - (unsigned long)mi->start); + "Ignoring memory bank 0x%08lx size %ldKB\n", + start, end - start); return -EINVAL; } - sysmem.bank[sysmem.nr_banks].type = mi->type; - sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(mi->start); - sysmem.bank[sysmem.nr_banks].end = mi->end & PAGE_MASK; + sysmem.bank[sysmem.nr_banks].type = type; + sysmem.bank[sysmem.nr_banks].start = PAGE_ALIGN(start); + sysmem.bank[sysmem.nr_banks].end = end & PAGE_MASK; sysmem.nr_banks++; return 0; } +static int __init parse_tag_mem(const bp_tag_t *tag) +{ + meminfo_t *mi = (meminfo_t *)(tag->data); + + if (mi->type != MEMORY_TYPE_CONVENTIONAL) + return -1; + + return add_sysmem_bank(mi->type, mi->start, mi->end); +} + __tagtable(BP_TAG_MEMORY, parse_tag_mem); #ifdef CONFIG_BLK_DEV_INITRD @@ -143,12 +160,31 @@ static int __init parse_tag_initrd(const bp_tag_t* tag) __tagtable(BP_TAG_INITRD, parse_tag_initrd); +#ifdef CONFIG_OF + +static int __init parse_tag_fdt(const bp_tag_t *tag) +{ + dtb_start = (void *)(tag->data[0]); + return 0; +} + +__tagtable(BP_TAG_FDT, parse_tag_fdt); + +void __init early_init_dt_setup_initrd_arch(unsigned long start, + unsigned long end) +{ + initrd_start = (void *)__va(start); + initrd_end = (void *)__va(end); + initrd_below_start_ok = 1; +} + +#endif /* CONFIG_OF */ + #endif /* CONFIG_BLK_DEV_INITRD */ static int __init parse_tag_cmdline(const bp_tag_t* tag) { - strncpy(command_line, (char*)(tag->data), COMMAND_LINE_SIZE); - command_line[COMMAND_LINE_SIZE - 1] = '\0'; + strlcpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE); return 0; } @@ -186,6 +222,58 @@ static int __init parse_bootparam(const bp_tag_t* tag) return 0; } +#ifdef CONFIG_OF + +void __init early_init_dt_add_memory_arch(u64 base, u64 size) +{ + size &= PAGE_MASK; + add_sysmem_bank(MEMORY_TYPE_CONVENTIONAL, base, base + size); +} + +void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) +{ + return __alloc_bootmem(size, align, 0); +} + +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, TCE reserve, and more ... + */ + if (!command_line[0]) + of_scan_flat_dt(early_init_dt_scan_chosen, command_line); + + /* Scan memory nodes and rebuild MEMBLOCKs */ + of_scan_flat_dt(early_init_dt_scan_root, NULL); + if (sysmem.nr_banks == 0) + of_scan_flat_dt(early_init_dt_scan_memory, NULL); +} + +static void __init copy_devtree(void) +{ + void *alloc = early_init_dt_alloc_memory_arch( + be32_to_cpu(initial_boot_params->totalsize), 0); + if (alloc) { + memcpy(alloc, initial_boot_params, + be32_to_cpu(initial_boot_params->totalsize)); + initial_boot_params = alloc; + } +} + +static int __init xtensa_device_probe(void) +{ + of_platform_populate(NULL, NULL, NULL, NULL); + return 0; +} + +device_initcall(xtensa_device_probe); + +#endif /* CONFIG_OF */ + /* * Initialize architecture. (Early stage) */ @@ -194,14 +282,14 @@ void __init init_arch(bp_tag_t *bp_start) { sysmem.nr_banks = 0; -#ifdef CONFIG_CMDLINE_BOOL - strcpy(command_line, default_command_line); -#endif - /* Parse boot parameters */ if (bp_start) - parse_bootparam(bp_start); + parse_bootparam(bp_start); + +#ifdef CONFIG_OF + early_init_devtree(dtb_start); +#endif if (sysmem.nr_banks == 0) { sysmem.nr_banks = 1; @@ -210,6 +298,11 @@ void __init init_arch(bp_tag_t *bp_start) + PLATFORM_DEFAULT_MEM_SIZE; } +#ifdef CONFIG_CMDLINE_BOOL + if (!command_line[0]) + strlcpy(command_line, default_command_line, COMMAND_LINE_SIZE); +#endif + /* Early hook for platforms */ platform_init(bp_start); @@ -355,11 +448,7 @@ void __init check_s32c1i(void) void __init setup_arch(char **cmdline_p) { - extern int mem_reserve(unsigned long, unsigned long, int); - extern void bootmem_init(void); - - memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); - boot_command_line[COMMAND_LINE_SIZE-1] = '\0'; + strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); *cmdline_p = command_line; check_s32c1i(); @@ -395,8 +484,12 @@ void __init setup_arch(char **cmdline_p) bootmem_init(); - platform_setup(cmdline_p); +#ifdef CONFIG_OF + copy_devtree(); + unflatten_device_tree(); +#endif + platform_setup(cmdline_p); paging_init(); zones_init(); |