Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / nios2 / lib / bootm.c

diff --git a/qemu/roms/u-boot/arch/nios2/lib/bootm.c b/qemu/roms/u-boot/arch/nios2/lib/bootm.c
new file mode 100644 (file)
index 0000000..c730a3f
--- /dev/null
+++ b/qemu/roms/u-boot/arch/nios2/lib/bootm.c
@@ -0,0 +1,61 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/byteorder.h>
+#include <asm/cache.h>
+
+#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
+
+int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
+{
+       void (*kernel)(int, int, int, char *) = (void *)images->ep;
+       char *commandline = getenv("bootargs");
+       ulong initrd_start = images->rd_start;
+       ulong initrd_end = images->rd_end;
+       char *of_flat_tree = NULL;
+#if defined(CONFIG_OF_LIBFDT)
+       /* did generic code already find a device tree? */
+       if (images->ft_len)
+               of_flat_tree = images->ft_addr;
+#endif
+       if (!of_flat_tree && argc > 1)
+               of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
+       if (of_flat_tree)
+               initrd_end = (ulong)of_flat_tree;
+
+       /*
+        * allow the PREP bootm subcommand, it is required for bootm to work
+        */
+       if (flag & BOOTM_STATE_OS_PREP)
+               return 0;
+
+       if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
+               return 1;
+
+       /* flushes data and instruction caches before calling the kernel */
+       disable_interrupts();
+       flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
+       flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
+
+       debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
+       debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
+       /* kernel parameters passing
+        * r4 : NIOS magic
+        * r5 : initrd start
+        * r6 : initrd end or fdt
+        * r7 : kernel command line
+        * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
+        * verified with fdt magic. when both initrd and fdt are used at the
+        * same time, fdt must follow immediately after initrd.
+        */
+       kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
+       /* does not return */
+
+       return 1;
+}