Based on other architectures already supported. Tested on OMAP3 Beagle board and another unnamed ARM platform.
Signed-off-by: John Rigby john.rigby@linaro.org Tested-by: Rob Herring rob.herring@smooth-stone.com --- arch/arm/include/asm/config.h | 2 + arch/arm/lib/bootm.c | 137 ++++++++++++++++++++++++++++++++++++----- 2 files changed, 123 insertions(+), 16 deletions(-)
diff --git a/arch/arm/include/asm/config.h b/arch/arm/include/asm/config.h index 4e8dfd7..d8e33fc 100644 --- a/arch/arm/include/asm/config.h +++ b/arch/arm/include/asm/config.h @@ -25,4 +25,6 @@ /* Relocation to SDRAM works on all ARM boards */ #define CONFIG_RELOC_FIXUP_WORKS #endif +#define CONFIG_LMB +#define CONFIG_SYS_BOOT_RAMDISK_HIGH #endif diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 3101321..2e7b2e1 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -26,6 +26,9 @@ #include <image.h> #include <u-boot/zlib.h> #include <asm/byteorder.h> +#include <fdt.h> +#include <libfdt.h> +#include <fdt_support.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -50,12 +53,52 @@ static void setup_end_tag (bd_t *bd); static struct tag *params; #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
-int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) +static ulong get_sp(void); +#if defined(CONFIG_OF_LIBFDT) +static int bootm_linux_fdt(int machid, bootm_headers_t *images); +#endif + +void arch_lmb_reserve(struct lmb *lmb) +{ + ulong sp; + + /* + * Booting a (Linux) kernel image + * + * Allocate space for command line and board info - the + * address should be as high as possible within the reach of + * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused + * memory, which means far enough below the current stack + * pointer. + */ + sp = get_sp(); + debug("## Current stack ends at 0x%08lx ", sp); + + /* adjust sp by 1K to be safe */ + sp -= 1024; + lmb_reserve(lmb, sp, + gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp); +} + +static void announce_and_cleanup(void) +{ + printf("\nStarting kernel ...\n\n"); + +#ifdef CONFIG_USB_DEVICE + { + extern void udc_disconnect(void); + udc_disconnect(); + } +#endif + cleanup_before_linux(); +} + +int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) { bd_t *bd = gd->bd; char *s; int machid = bd->bi_arch_number; - void (*theKernel)(int zero, int arch, uint params); + void (*kernel_entry)(int zero, int arch, uint params);
#ifdef CONFIG_CMDLINE_TAG char *commandline = getenv ("bootargs"); @@ -64,8 +107,6 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1;
- theKernel = (void (*)(int, int, uint))images->ep; - s = getenv ("machid"); if (s) { machid = simple_strtoul (s, NULL, 16); @@ -74,8 +115,15 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima
show_boot_progress (15);
+#ifdef CONFIG_OF_LIBFDT + if (images->ft_len) + return bootm_linux_fdt(machid, images); +#endif + + kernel_entry = (void (*)(int, int, uint))images->ep; + debug ("## Transferring control to Linux (at address %08lx) ...\n", - (ulong) theKernel); + (ulong) kernel_entry);
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ @@ -99,27 +147,76 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima if (images->rd_start && images->rd_end) setup_initrd_tag (bd, images->rd_start, images->rd_end); #endif - setup_end_tag (bd); + setup_end_tag(bd); #endif
- /* we assume that the kernel is in place */ - printf ("\nStarting kernel ...\n\n"); + announce_and_cleanup();
-#ifdef CONFIG_USB_DEVICE - { - extern void udc_disconnect (void); - udc_disconnect (); + kernel_entry(0, machid, bd->bi_boot_params); + /* does not return */ + + return 1; +} + +#if defined(CONFIG_OF_LIBFDT) +static int fixup_memory_node(void *blob) +{ + bd_t *bd = gd->bd; + int bank; + u64 start[CONFIG_NR_DRAM_BANKS]; + u64 size[CONFIG_NR_DRAM_BANKS]; + + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { + start[bank] = bd->bi_dram[bank].start; + size[bank] = bd->bi_dram[bank].size; } -#endif
- cleanup_before_linux (); + return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); +} + +static int bootm_linux_fdt(int machid, bootm_headers_t *images) +{ + ulong rd_len; + bd_t *bd = gd->bd; + char *s; + void (*kernel_entry)(int zero, int dt_machid, void *dtblob); + ulong bootmap_base = getenv_bootm_low(); + ulong of_size = images->ft_len; + char **of_flat_tree = &images->ft_addr; + ulong *initrd_start = &images->initrd_start; + ulong *initrd_end = &images->initrd_end; + struct lmb *lmb = &images->lmb; + int ret; + + kernel_entry = (void (*)(int, int, void *))images->ep; + + rd_len = images->rd_end - images->rd_start; + ret = boot_ramdisk_high(lmb, images->rd_start, rd_len, + initrd_start, initrd_end); + if (ret) + return ret; + + ret = boot_relocate_fdt(lmb, bootmap_base, of_flat_tree, &of_size); + if (ret) + return ret;
- theKernel (0, machid, bd->bi_boot_params); + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) kernel_entry); + + fdt_chosen(*of_flat_tree, 1); + + fixup_memory_node(*of_flat_tree); + + fdt_initrd(*of_flat_tree, *initrd_start, *initrd_end, 1); + + announce_and_cleanup(); + + kernel_entry(0, machid, *of_flat_tree); /* does not return */
return 1; } - +#endif
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ @@ -239,4 +336,12 @@ static void setup_end_tag (bd_t *bd) params->hdr.size = 0; }
+static ulong get_sp(void) +{ + ulong ret; + + asm("mov %0, sp" : "=r"(ret) : ); + return ret; +} + #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */