Optionally setup old style linux bootparams for -kernel, by Juergen Lock.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3089 c046a42c-6fe2-441c-8c8c-71466251a162

3 files changed, 89 insertions, 1 deletions

diff --git a/hw/arm_boot.c b/hw/arm_boot.c
index ed3ec5830e..ccc9ecbf62 100644
--- a/hw/arm_boot.c
+++ b/hw/arm_boot.c
@@ -76,6 +76,77 @@ static void set_kernel_args(uint32_t ram_size, int initrd_size,
     stl_raw(p++, 0);
 }
 
+static void set_kernel_args_old(uint32_t ram_size, int initrd_size,
+                                const char *kernel_cmdline,
+                                target_phys_addr_t loader_start)
+{
+    uint32_t *p;
+    unsigned char *s;
+
+    /* see linux/include/asm-arm/setup.h */
+    p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
+    /* page_size */
+    stl_raw(p++, 4096);
+    /* nr_pages */
+    stl_raw(p++, ram_size / 4096);
+    /* ramdisk_size */
+    stl_raw(p++, 0);
+#define FLAG_READONLY	1
+#define FLAG_RDLOAD	4
+#define FLAG_RDPROMPT	8
+    /* flags */
+    stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT);
+    /* rootdev */
+    stl_raw(p++, (31 << 8) | 0);	/* /dev/mtdblock0 */
+    /* video_num_cols */
+    stl_raw(p++, 0);
+    /* video_num_rows */
+    stl_raw(p++, 0);
+    /* video_x */
+    stl_raw(p++, 0);
+    /* video_y */
+    stl_raw(p++, 0);
+    /* memc_control_reg */
+    stl_raw(p++, 0);
+    /* unsigned char sounddefault */
+    /* unsigned char adfsdrives */
+    /* unsigned char bytes_per_char_h */
+    /* unsigned char bytes_per_char_v */
+    stl_raw(p++, 0);
+    /* pages_in_bank[4] */
+    stl_raw(p++, 0);
+    stl_raw(p++, 0);
+    stl_raw(p++, 0);
+    stl_raw(p++, 0);
+    /* pages_in_vram */
+    stl_raw(p++, 0);
+    /* initrd_start */
+    if (initrd_size)
+        stl_raw(p++, loader_start + INITRD_LOAD_ADDR);
+    else
+        stl_raw(p++, 0);
+    /* initrd_size */
+    stl_raw(p++, initrd_size);
+    /* rd_start */
+    stl_raw(p++, 0);
+    /* system_rev */
+    stl_raw(p++, 0);
+    /* system_serial_low */
+    stl_raw(p++, 0);
+    /* system_serial_high */
+    stl_raw(p++, 0);
+    /* mem_fclk_21285 */
+    stl_raw(p++, 0);
+    /* zero unused fields */
+    memset(p, 0, 256 + 1024 -
+           (p - ((uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR))));
+    s = phys_ram_base + KERNEL_ARGS_ADDR + 256 + 1024;
+    if (kernel_cmdline)
+        strcpy (s, kernel_cmdline);
+    else
+        stb_raw(s, 0);
+}
+
 void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
                      const char *kernel_cmdline, const char *initrd_filename,
                      int board_id, target_phys_addr_t loader_start)
@@ -140,6 +211,11 @@ void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
         bootloader[6] = entry;
         for (n = 0; n < sizeof(bootloader) / 4; n++)
             stl_raw(phys_ram_base + (n * 4), bootloader[n]);
-        set_kernel_args(ram_size, initrd_size, kernel_cmdline, loader_start);
+        if (old_param)
+            set_kernel_args_old(ram_size, initrd_size,
+                                kernel_cmdline, loader_start);
+        else
+            set_kernel_args(ram_size, initrd_size,
+                            kernel_cmdline, loader_start);
     }
 }
diff --git a/vl.c b/vl.c
index 497a1e5fac..dc2297ecf5 100644
--- a/vl.c
+++ b/vl.c
@@ -197,6 +197,9 @@ const char *option_rom[MAX_OPTION_ROMS];
 int nb_option_roms;
 int semihosting_enabled = 0;
 int autostart = 1;
+#ifdef TARGET_ARM
+int old_param = 0;
+#endif
 const char *qemu_name;
 int alt_grab = 0;
 #ifdef TARGET_SPARC
@@ -6801,6 +6804,7 @@ enum {
     QEMU_OPTION_semihosting,
     QEMU_OPTION_name,
     QEMU_OPTION_prom_env,
+    QEMU_OPTION_old_param,
 };
 
 typedef struct QEMUOption {
@@ -6902,6 +6906,9 @@ const QEMUOption qemu_options[] = {
 #if defined(TARGET_SPARC)
     { "prom-env", HAS_ARG, QEMU_OPTION_prom_env },
 #endif
+#if defined(TARGET_ARM)
+    { "old-param", 0, QEMU_OPTION_old_param },
+#endif
     { NULL },
 };
 
@@ -7676,6 +7683,10 @@ int main(int argc, char **argv)
                 nb_prom_envs++;
                 break;
 #endif
+#ifdef TARGET_ARM
+            case QEMU_OPTION_old_param:
+                old_param = 1;
+#endif
             }
         }
     }
diff --git a/vl.h b/vl.h
index 6627bcef0a..d943e7f483 100644
--- a/vl.h
+++ b/vl.h
@@ -164,6 +164,7 @@ extern int graphic_rotate;
 extern int no_quit;
 extern int semihosting_enabled;
 extern int autostart;
+extern int old_param;
 extern const char *bootp_filename;
 
 #define MAX_OPTION_ROMS 16