SH4: Add support for kernel cmdline

Backport of revisions 6792, 6916, 6919 from trunk.



git-svn-id: svn://svn.savannah.nongnu.org/qemu/branches/stable_0_10@6960 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 16 insertions, 5 deletions

diff --git a/hw/r2d.c b/hw/r2d.c
index 713fc53b7e..7ac23a4018 100644
--- a/hw/r2d.c
+++ b/hw/r2d.c
@@ -37,6 +37,9 @@
 
 #define SM501_VRAM_SIZE 0x800000
 
+/* CONFIG_BOOT_LINK_OFFSET of Linux kernel */
+#define LINUX_LOAD_OFFSET 0x800000
+
 #define PA_IRLMSK	0x00
 #define PA_POWOFF	0x30
 #define PA_VERREG	0x32
@@ -233,20 +236,27 @@ static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
         pci_nic_init(pci, &nd_table[i], (i==0)? 2<<3: -1, "rtl8139");
 
     /* Todo: register on board registers */
-    {
+    if (kernel_filename) {
       int kernel_size;
       /* initialization which should be done by firmware */
       stl_phys(SH7750_BCR1, 1<<3); /* cs3 SDRAM */
       stw_phys(SH7750_BCR2, 3<<(3*2)); /* cs3 32bit */
 
-      kernel_size = load_image(kernel_filename, phys_ram_base);
+      if (kernel_cmdline) {
+          kernel_size = load_image_targphys(kernel_filename,
+				   SDRAM_BASE + LINUX_LOAD_OFFSET,
+				   SDRAM_SIZE - LINUX_LOAD_OFFSET);
+          env->pc = (SDRAM_BASE + LINUX_LOAD_OFFSET) | 0xa0000000;
+          pstrcpy_targphys(SDRAM_BASE + 0x10100, 256, kernel_cmdline);
+      } else {
+          kernel_size = load_image_targphys(kernel_filename, SDRAM_BASE, SDRAM_SIZE);
+          env->pc = SDRAM_BASE | 0xa0000000; /* Start from P2 area */
+      }
 
       if (kernel_size < 0) {
         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
         exit(1);
       }
-
-      env->pc = SDRAM_BASE | 0xa0000000; /* Start from P2 area */
     }
 }
 
diff --git a/loader.c b/loader.c
index 71b9ba7852..55625cf5b0 100644
--- a/loader.c
+++ b/loader.c
@@ -90,11 +90,12 @@ int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
     while (nbytes) {
 	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
 	did = fread(buf, 1, want, f);
-	if (did != want) break;
 
 	cpu_physical_memory_write_rom(dst_addr, buf, did);
 	dst_addr += did;
 	nbytes -= did;
+	if (did != want)
+	    break;
     }
     return dst_addr - dst_begin;
 }