diff options
Diffstat (limited to 'arch/powerpc/boot')
| -rw-r--r-- | arch/powerpc/boot/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/boot/devtree.c | 111 | ||||
| -rw-r--r-- | arch/powerpc/boot/main.c | 27 | ||||
| -rw-r--r-- | arch/powerpc/boot/ops.h | 13 |
4 files changed, 136 insertions, 17 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index de80e47d1171..fac6ed0c5bcd 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -42,7 +42,7 @@ $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \ src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \ ns16550.c serial.c simple_alloc.c div64.S util.S \ - gunzip_util.c $(zlib) + gunzip_util.c $(zlib) devtree.c src-plat := of.c src-boot := $(src-wlib) $(src-plat) empty.c diff --git a/arch/powerpc/boot/devtree.c b/arch/powerpc/boot/devtree.c new file mode 100644 index 000000000000..708cadebeb46 --- /dev/null +++ b/arch/powerpc/boot/devtree.c @@ -0,0 +1,111 @@ +/* + * devtree.c - convenience functions for device tree manipulation + * Copyright 2007 David Gibson, IBM Corporation. + * Copyright (c) 2007 Freescale Semiconductor, Inc. + * + * Authors: David Gibson <david@gibson.dropbear.id.au> + * Scott Wood <scottwood@freescale.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <stdarg.h> +#include <stddef.h> +#include "types.h" +#include "string.h" +#include "stdio.h" +#include "ops.h" + +void dt_fixup_memory(u64 start, u64 size) +{ + void *root, *memory; + int naddr, nsize, i; + u32 memreg[4]; + + root = finddevice("/"); + if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0) + naddr = 2; + if (naddr < 1 || naddr > 2) + fatal("Can't cope with #address-cells == %d in /\n\r", naddr); + + if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0) + nsize = 1; + if (nsize < 1 || nsize > 2) + fatal("Can't cope with #size-cells == %d in /\n\r", nsize); + + i = 0; + if (naddr == 2) + memreg[i++] = start >> 32; + memreg[i++] = start & 0xffffffff; + if (nsize == 2) + memreg[i++] = size >> 32; + memreg[i++] = size & 0xffffffff; + + memory = finddevice("/memory"); + if (! memory) { + memory = create_node(NULL, "memory"); + setprop_str(memory, "device_type", "memory"); + } + + printf("Memory <- <0x%x", memreg[0]); + for (i = 1; i < (naddr + nsize); i++) + printf(" 0x%x", memreg[i]); + printf("> (%ldMB)\n\r", (unsigned long)(size >> 20)); + + setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32)); +} + +#define MHZ(x) ((x + 500000) / 1000000) + +void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus) +{ + void *devp = NULL; + + printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu)); + printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb)); + if (bus > 0) + printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus)); + + while ((devp = find_node_by_devtype(devp, "cpu"))) { + setprop_val(devp, "clock-frequency", cpu); + setprop_val(devp, "timebase-frequency", tb); + if (bus > 0) + setprop_val(devp, "bus-frequency", bus); + } +} + +void dt_fixup_clock(const char *path, u32 freq) +{ + void *devp = finddevice(path); + + if (devp) { + printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq)); + setprop_val(devp, "clock-frequency", freq); + } +} + +void __dt_fixup_mac_addresses(u32 startindex, ...) +{ + va_list ap; + u32 index = startindex; + void *devp; + const u8 *addr; + + va_start(ap, startindex); + while ((addr = va_arg(ap, const u8 *))) { + devp = find_node_by_prop_value(NULL, "linux,network-index", + (void*)&index, sizeof(index)); + + printf("ENET%d: local-mac-address <-" + " %02x:%02x:%02x:%02x:%02x:%02x\n\r", index, + addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); + + if (devp) + setprop(devp, "local-mac-address", addr, 6); + + index++; + } + va_end(ap); +} diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c index e1df8feaf16d..ab9dfe2b38f1 100644 --- a/arch/powerpc/boot/main.c +++ b/arch/powerpc/boot/main.c @@ -153,13 +153,10 @@ static struct addr_range prep_kernel(void) return (struct addr_range){addr, ei.memsize}; } -static struct addr_range prep_initrd(struct addr_range vmlinux, +static struct addr_range prep_initrd(struct addr_range vmlinux, void *chosen, unsigned long initrd_addr, unsigned long initrd_size) { - void *devp; - u32 initrd_start, initrd_end; - /* If we have an image attached to us, it overrides anything * supplied by the loader. */ if (_initrd_end > _initrd_start) { @@ -198,16 +195,8 @@ static struct addr_range prep_initrd(struct addr_range vmlinux, printf("initrd head: 0x%lx\n\r", *((unsigned long *)initrd_addr)); /* Tell the kernel initrd address via device tree */ - devp = finddevice("/chosen"); - if (! devp) - fatal("Device tree has no chosen node!\n\r"); - - initrd_start = (u32)initrd_addr; - initrd_end = (u32)initrd_addr + initrd_size; - - setprop(devp, "linux,initrd-start", &initrd_start, - sizeof(initrd_start)); - setprop(devp, "linux,initrd-end", &initrd_end, sizeof(initrd_end)); + setprop_val(chosen, "linux,initrd-start", (u32)(initrd_addr)); + setprop_val(chosen, "linux,initrd-end", (u32)(initrd_addr+initrd_size)); return (struct addr_range){(void *)initrd_addr, initrd_size}; } @@ -254,6 +243,7 @@ void start(void) kernel_entry_t kentry; char cmdline[COMMAND_LINE_SIZE]; unsigned long ft_addr = 0; + void *chosen; if (console_ops.open && (console_ops.open() < 0)) exit(); @@ -263,9 +253,14 @@ void start(void) printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, get_sp()); + /* Ensure that the device tree has a /chosen node */ + chosen = finddevice("/chosen"); + if (!chosen) + chosen = create_node(NULL, "chosen"); + vmlinux = prep_kernel(); - initrd = prep_initrd(vmlinux, loader_info.initrd_addr, - loader_info.initrd_size); + initrd = prep_initrd(vmlinux, chosen, + loader_info.initrd_addr, loader_info.initrd_size); /* If cmdline came from zimage wrapper or if we can edit the one * in the dt, print it out and edit it, if possible. diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h index 592dc6c20bdb..cc191e8e147f 100644 --- a/arch/powerpc/boot/ops.h +++ b/arch/powerpc/boot/ops.h @@ -96,6 +96,11 @@ static inline int setprop(void *devp, const char *name, { return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1; } +#define setprop_val(devp, name, val) \ + do { \ + typeof(val) x = (val); \ + setprop((devp), (name), &x, sizeof(x)); \ + } while (0) static inline int setprop_str(void *devp, const char *name, const char *buf) { @@ -141,6 +146,14 @@ static inline void *find_node_by_devtype(const void *prev, return find_node_by_prop_value_str(prev, "device_type", type); } +void dt_fixup_memory(u64 start, u64 size); +void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq); +void dt_fixup_clock(const char *path, u32 freq); +void __dt_fixup_mac_addresses(u32 startindex, ...); +#define dt_fixup_mac_addresses(...) \ + __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL) + + static inline void *malloc(u32 size) { return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL; |
