nvram: Introduce helper functions for CHRP "system" and "free space" partitions

The "system partition" and "free space" partition layouts are
defined by the CHRP and LoPAPR specification, and used by
OpenBIOS and SLOF. We can re-use this code for other machines
that use OpenBIOS and SLOF, too. So let's make this code independent
from the MAC NVRAM environment and put it into two proper helper
functions.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 8 insertions, 32 deletions

diff --git a/hw/nvram/mac_nvram.c b/hw/nvram/mac_nvram.c
index 24f6121..c0e62a5 100644
--- a/hw/nvram/mac_nvram.c
+++ b/hw/nvram/mac_nvram.c
@@ -25,7 +25,7 @@
 #include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "hw/nvram/openbios_firmware_abi.h"
-#include "sysemu/sysemu.h"
+#include "hw/nvram/chrp_nvram.h"
 #include "hw/ppc/mac.h"
 #include "qemu/cutils.h"
 #include <zlib.h>
@@ -146,38 +146,14 @@ static void macio_nvram_register_types(void)
 static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off,
                                            int len)
 {
-    unsigned int i;
-    uint32_t start = off, end;
-    struct OpenBIOS_nvpart_v1 *part_header;
+    int sysp_end;
+
+    /* OpenBIOS nvram variables partition */
+    sysp_end = chrp_nvram_create_system_partition(&nvr->data[off],
+                                                  DEF_SYSTEM_SIZE) + off;
 
-    // OpenBIOS nvram variables
-    // Variable partition
-    part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
-    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);
-    /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
-       new variables. */
-    if (end < DEF_SYSTEM_SIZE)
-        end = DEF_SYSTEM_SIZE;
-    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);
+    /* Free space partition */
+    chrp_nvram_create_free_partition(&nvr->data[sysp_end], len - sysp_end);
 }
 
 #define OSX_NVRAM_SIGNATURE     (0x5A)