From 95efd11c121ed5ba9677f9fbaf0cefa8e52cb02e Mon Sep 17 00:00:00 2001
From: blueswir1 <blueswir1@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 24 Dec 2008 20:26:14 +0000
Subject: [PATCH] Add support for -prom-env command line options

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6129 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/mac_nvram.c | 49 ++++++++++++++++++++++++++++++-------------------
 qemu-doc.texi  | 12 ++++++++++++
 sysemu.h       |  2 +-
 vl.c           |  6 +++---
 4 files changed, 46 insertions(+), 23 deletions(-)

diff --git a/hw/mac_nvram.c b/hw/mac_nvram.c
index 3787f54d65..773f2d8aec 100644
--- a/hw/mac_nvram.c
+++ b/hw/mac_nvram.c
@@ -23,6 +23,8 @@
  * THE SOFTWARE.
  */
 #include "hw.h"
+#include "firmware_abi.h"
+#include "sysemu.h"
 #include "ppc_mac.h"
 
 /* debug NVR */
@@ -122,26 +124,35 @@ void macio_nvram_map (void *opaque, target_phys_addr_t mem_base)
     cpu_register_physical_memory(mem_base, s->size, s->mem_index);
 }
 
-static uint8_t nvram_chksum (const uint8_t *buf, int n)
-{
-    int sum, i;
-    sum = 0;
-    for(i = 0; i < n; i++)
-        sum += buf[i];
-    return (sum & 0xff) + (sum >> 8);
-}
-
-/* set a free Mac OS NVRAM partition */
+/* Set up a system OpenBIOS NVRAM partition */
 void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
 {
-    uint8_t *buf;
-    char partition_name[12] = "wwwwwwwwwwww";
+    unsigned int i;
+    uint32_t start = 0, end;
+    struct OpenBIOS_nvpart_v1 *part_header;
 
-    buf = nvr->data;
-    buf[0] = 0x7f; /* free partition magic */
-    buf[1] = 0; /* checksum */
-    buf[2] = len >> 8;
-    buf[3] = len;
-    memcpy(buf + 4, partition_name, 12);
-    buf[1] = nvram_chksum(buf, 16);
+    // OpenBIOS nvram variables
+    // Variable partition
+    part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
+    part_header->signature = OPENBIOS_PART_SYSTEM;
+    pstrcpy(part_header->name, sizeof(part_header->name), "system");
+
+    end = start + sizeof(struct OpenBIOS_nvpart_v1);
+    for (i = 0; i < nb_prom_envs; i++)
+        end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
+
+    // End marker
+    nvr->data[end++] = '\0';
+
+    end = start + ((end - start + 15) & ~15);
+    OpenBIOS_finish_partition(part_header, end - start);
+
+    // free partition
+    start = end;
+    part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
+    part_header->signature = OPENBIOS_PART_FREE;
+    pstrcpy(part_header->name, sizeof(part_header->name), "free");
+
+    end = len;
+    OpenBIOS_finish_partition(part_header, end - start);
 }
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 7156b2db2d..0f1e7ccf5a 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2343,6 +2343,18 @@ The following options are specific to the PowerPC emulation:
 
 Set the initial VGA graphic mode. The default is 800x600x15.
 
+@item -prom-env string
+
+Set OpenBIOS variables in NVRAM, for example:
+
+@example
+qemu-system-ppc -prom-env 'auto-boot?=false' \
+ -prom-env 'boot-device=hd:2,\yaboot' \
+ -prom-env 'boot-args=conf=hd:2,\yaboot.conf'
+@end example
+
+These variables are not used by Open Hack'Ware.
+
 @end table
 
 @c man end
diff --git a/sysemu.h b/sysemu.h
index 94cffaf954..6e24e8a95e 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -108,7 +108,7 @@ extern int kqemu_allowed;
 extern const char *option_rom[MAX_OPTION_ROMS];
 extern int nb_option_roms;
 
-#ifdef TARGET_SPARC
+#if defined(TARGET_SPARC) || defined(TARGET_PPC)
 #define MAX_PROM_ENVS 128
 extern const char *prom_envs[MAX_PROM_ENVS];
 extern unsigned int nb_prom_envs;
diff --git a/vl.c b/vl.c
index a1a9cf4014..07740f51e4 100644
--- a/vl.c
+++ b/vl.c
@@ -231,7 +231,7 @@ int old_param = 0;
 #endif
 const char *qemu_name;
 int alt_grab = 0;
-#ifdef TARGET_SPARC
+#if defined(TARGET_SPARC) || defined(TARGET_PPC)
 unsigned int nb_prom_envs = 0;
 const char *prom_envs[MAX_PROM_ENVS];
 #endif
@@ -4185,7 +4185,7 @@ static const QEMUOption qemu_options[] = {
     { "semihosting", 0, QEMU_OPTION_semihosting },
 #endif
     { "name", HAS_ARG, QEMU_OPTION_name },
-#if defined(TARGET_SPARC)
+#if defined(TARGET_SPARC) || defined(TARGET_PPC)
     { "prom-env", HAS_ARG, QEMU_OPTION_prom_env },
 #endif
 #if defined(TARGET_ARM)
@@ -5049,7 +5049,7 @@ int main(int argc, char **argv, char **envp)
             case QEMU_OPTION_name:
                 qemu_name = optarg;
                 break;
-#ifdef TARGET_SPARC
+#if defined(TARGET_SPARC) || defined(TARGET_PPC)
             case QEMU_OPTION_prom_env:
                 if (nb_prom_envs >= MAX_PROM_ENVS) {
                     fprintf(stderr, "Too many prom variables\n");