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-rw-r--r--hw/cris/boot.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/hw/cris/boot.c b/hw/cris/boot.c
new file mode 100644
index 0000000000..c330e22a86
--- /dev/null
+++ b/hw/cris/boot.c
@@ -0,0 +1,98 @@
+/*
+ * CRIS image loading.
+ *
+ * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/hw.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "hw/cris-boot.h"
+
+static void main_cpu_reset(void *opaque)
+{
+ CRISCPU *cpu = opaque;
+ CPUCRISState *env = &cpu->env;
+ struct cris_load_info *li;
+
+ li = env->load_info;
+
+ cpu_reset(CPU(cpu));
+
+ if (!li) {
+ /* nothing more to do. */
+ return;
+ }
+
+ env->pc = li->entry;
+
+ if (li->image_filename) {
+ env->regs[8] = 0x56902387; /* RAM boot magic. */
+ env->regs[9] = 0x40004000 + li->image_size;
+ }
+
+ if (li->cmdline) {
+ /* Let the kernel know we are modifying the cmdline. */
+ env->regs[10] = 0x87109563;
+ env->regs[11] = 0x40000000;
+ }
+}
+
+static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
+{
+ return addr - 0x80000000LL;
+}
+
+void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
+{
+ CPUCRISState *env = &cpu->env;
+ uint64_t entry, high;
+ int kcmdline_len;
+ int image_size;
+
+ env->load_info = li;
+ /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
+ devboard SDK. */
+ image_size = load_elf(li->image_filename, translate_kernel_address, NULL,
+ &entry, NULL, &high, 0, ELF_MACHINE, 0);
+ li->entry = entry;
+ if (image_size < 0) {
+ /* Takes a kimage from the axis devboard SDK. */
+ image_size = load_image_targphys(li->image_filename, 0x40004000,
+ ram_size);
+ li->entry = 0x40004000;
+ }
+
+ if (image_size < 0) {
+ fprintf(stderr, "qemu: could not load kernel '%s'\n",
+ li->image_filename);
+ exit(1);
+ }
+
+ if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
+ if (kcmdline_len > 256) {
+ fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
+ exit(1);
+ }
+ pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);
+ }
+ qemu_register_reset(main_cpu_reset, cpu);
+}