diff options
Diffstat (limited to 'arch/powerpc/boot/main.c')
| -rw-r--r-- | arch/powerpc/boot/main.c | 57 |
1 files changed, 28 insertions, 29 deletions
diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c index d719bb9333d1..6f6b50d238b6 100644 --- a/arch/powerpc/boot/main.c +++ b/arch/powerpc/boot/main.c @@ -27,6 +27,8 @@ extern char _vmlinux_start[]; extern char _vmlinux_end[]; extern char _initrd_start[]; extern char _initrd_end[]; +extern char _dtb_start[]; +extern char _dtb_end[]; struct addr_range { unsigned long addr; @@ -167,7 +169,7 @@ static int is_elf32(void *hdr) return 1; } -static void prep_kernel(unsigned long *a1, unsigned long *a2) +static void prep_kernel(unsigned long a1, unsigned long a2) { int len; @@ -203,11 +205,14 @@ static void prep_kernel(unsigned long *a1, unsigned long *a2) } /* - * Now we try to alloc memory for the initrd (and copy it there) + * Now find the initrd + * + * First see if we have an image attached to us. If so + * allocate memory for it and copy it there. */ initrd.size = (unsigned long)(_initrd_end - _initrd_start); initrd.memsize = initrd.size; - if ( initrd.size > 0 ) { + if (initrd.size > 0) { printf("Allocating 0x%lx bytes for initrd ...\n\r", initrd.size); initrd.addr = (unsigned long)malloc((u32)initrd.size); @@ -216,8 +221,6 @@ static void prep_kernel(unsigned long *a1, unsigned long *a2) "ramdisk !\n\r"); exit(); } - *a1 = initrd.addr; - *a2 = initrd.size; printf("initial ramdisk moving 0x%lx <- 0x%lx " "(0x%lx bytes)\n\r", initrd.addr, (unsigned long)_initrd_start, initrd.size); @@ -225,6 +228,12 @@ static void prep_kernel(unsigned long *a1, unsigned long *a2) initrd.size); printf("initrd head: 0x%lx\n\r", *((unsigned long *)initrd.addr)); + } else if (a2 != 0) { + /* Otherwise, see if yaboot or another loader gave us an initrd */ + initrd.addr = a1; + initrd.memsize = initrd.size = a2; + printf("Using loader supplied initrd at 0x%lx (0x%lx bytes)\n\r", + initrd.addr, initrd.size); } /* Eventually gunzip the kernel */ @@ -250,10 +259,6 @@ static void prep_kernel(unsigned long *a1, unsigned long *a2) flush_cache((void *)vmlinux.addr, vmlinux.size); } -void __attribute__ ((weak)) ft_init(void *dt_blob) -{ -} - /* A buffer that may be edited by tools operating on a zImage binary so as to * edit the command line passed to vmlinux (by setting /chosen/bootargs). * The buffer is put in it's own section so that tools may locate it easier. @@ -285,36 +290,22 @@ static void set_cmdline(char *buf) setprop(devp, "bootargs", buf, strlen(buf) + 1); } -/* Section where ft can be tacked on after zImage is built */ -union blobspace { - struct boot_param_header hdr; - char space[8*1024]; -} dt_blob __attribute__((__section__("__builtin_ft"))); - struct platform_ops platform_ops; struct dt_ops dt_ops; struct console_ops console_ops; void start(unsigned long a1, unsigned long a2, void *promptr, void *sp) { - int have_dt = 0; kernel_entry_t kentry; char cmdline[COMMAND_LINE_SIZE]; + unsigned long ft_addr = 0; memset(__bss_start, 0, _end - __bss_start); memset(&platform_ops, 0, sizeof(platform_ops)); memset(&dt_ops, 0, sizeof(dt_ops)); memset(&console_ops, 0, sizeof(console_ops)); - /* Override the dt_ops and device tree if there was an flat dev - * tree attached to the zImage. - */ - if (dt_blob.hdr.magic == OF_DT_HEADER) { - have_dt = 1; - ft_init(&dt_blob); - } - - if (platform_init(promptr)) + if (platform_init(promptr, _dtb_start, _dtb_end)) exit(); if (console_ops.open && (console_ops.open() < 0)) exit(); @@ -324,7 +315,7 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp) printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp); - prep_kernel(&a1, &a2); + prep_kernel(a1, a2); /* If cmdline came from zimage wrapper or if we can edit the one * in the dt, print it out and edit it, if possible. @@ -338,15 +329,23 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp) set_cmdline(cmdline); } + printf("Finalizing device tree..."); + if (dt_ops.finalize) + ft_addr = dt_ops.finalize(); + if (ft_addr) + printf(" flat tree at 0x%lx\n\r", ft_addr); + else + printf(" using OF tree (promptr=%p)\n\r", promptr); + if (console_ops.close) console_ops.close(); kentry = (kernel_entry_t) vmlinux.addr; - if (have_dt) - kentry(dt_ops.ft_addr(), 0, NULL); + if (ft_addr) + kentry(ft_addr, 0, NULL); else /* XXX initrd addr/size should be passed in properties */ - kentry(a1, a2, promptr); + kentry(initrd.addr, initrd.size, promptr); /* console closed so printf below may not work */ printf("Error: Linux kernel returned to zImage boot wrapper!\n\r"); |