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-rw-r--r--hw/nvram/Makefile.objs1
-rw-r--r--hw/nvram/chrp_nvram.c85
-rw-r--r--hw/nvram/mac_nvram.c49
-rw-r--r--hw/nvram/spapr_nvram.c6
4 files changed, 104 insertions, 37 deletions
diff --git a/hw/nvram/Makefile.objs b/hw/nvram/Makefile.objs
index e9a66940e0..c018f6b2ff 100644
--- a/hw/nvram/Makefile.objs
+++ b/hw/nvram/Makefile.objs
@@ -1,5 +1,6 @@
common-obj-$(CONFIG_DS1225Y) += ds1225y.o
common-obj-y += eeprom93xx.o
common-obj-y += fw_cfg.o
+common-obj-y += chrp_nvram.o
common-obj-$(CONFIG_MAC_NVRAM) += mac_nvram.o
obj-$(CONFIG_PSERIES) += spapr_nvram.o
diff --git a/hw/nvram/chrp_nvram.c b/hw/nvram/chrp_nvram.c
new file mode 100644
index 0000000000..3837510dd2
--- /dev/null
+++ b/hw/nvram/chrp_nvram.c
@@ -0,0 +1,85 @@
+/*
+ * Common Hardware Reference Platform NVRAM helper functions.
+ *
+ * The CHRP NVRAM layout is used by OpenBIOS and SLOF. See CHRP
+ * specification, chapter 8, or the LoPAPR specification for details
+ * about the NVRAM layout.
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "hw/hw.h"
+#include "hw/nvram/chrp_nvram.h"
+#include "sysemu/sysemu.h"
+
+static int chrp_nvram_set_var(uint8_t *nvram, int addr, const char *str)
+{
+ int len;
+
+ len = strlen(str) + 1;
+ memcpy(&nvram[addr], str, len);
+
+ return addr + len;
+}
+
+/**
+ * Create a "system partition", used for the Open Firmware
+ * environment variables.
+ */
+int chrp_nvram_create_system_partition(uint8_t *data, int min_len)
+{
+ ChrpNvramPartHdr *part_header;
+ unsigned int i;
+ int end;
+
+ part_header = (ChrpNvramPartHdr *)data;
+ part_header->signature = CHRP_NVPART_SYSTEM;
+ pstrcpy(part_header->name, sizeof(part_header->name), "system");
+
+ end = sizeof(ChrpNvramPartHdr);
+ for (i = 0; i < nb_prom_envs; i++) {
+ end = chrp_nvram_set_var(data, end, prom_envs[i]);
+ }
+
+ /* End marker */
+ data[end++] = '\0';
+
+ end = (end + 15) & ~15;
+ /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
+ new variables. */
+ if (end < min_len) {
+ end = min_len;
+ }
+ chrp_nvram_finish_partition(part_header, end);
+
+ return end;
+}
+
+/**
+ * Create a "free space" partition
+ */
+int chrp_nvram_create_free_partition(uint8_t *data, int len)
+{
+ ChrpNvramPartHdr *part_header;
+
+ part_header = (ChrpNvramPartHdr *)data;
+ part_header->signature = CHRP_NVPART_FREE;
+ pstrcpy(part_header->name, sizeof(part_header->name), "free");
+
+ chrp_nvram_finish_partition(part_header, len);
+
+ return len;
+}
diff --git a/hw/nvram/mac_nvram.c b/hw/nvram/mac_nvram.c
index 24f61212ba..63f9ed1d82 100644
--- a/hw/nvram/mac_nvram.c
+++ b/hw/nvram/mac_nvram.c
@@ -24,8 +24,7 @@
*/
#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 +145,14 @@ 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;
-
- // 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);
+ int sysp_end;
+
+ /* OpenBIOS nvram variables partition */
+ sysp_end = chrp_nvram_create_system_partition(&nvr->data[off],
+ DEF_SYSTEM_SIZE) + off;
+
+ /* Free space partition */
+ chrp_nvram_create_free_partition(&nvr->data[sysp_end], len - sysp_end);
}
#define OSX_NVRAM_SIGNATURE (0x5A)
@@ -187,15 +162,15 @@ static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off,
int len)
{
uint32_t start = off;
- struct OpenBIOS_nvpart_v1 *part_header;
+ ChrpNvramPartHdr *part_header;
unsigned char *data = &nvr->data[start];
/* empty partition */
- part_header = (struct OpenBIOS_nvpart_v1 *)data;
+ part_header = (ChrpNvramPartHdr *)data;
part_header->signature = OSX_NVRAM_SIGNATURE;
pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww");
- OpenBIOS_finish_partition(part_header, len);
+ chrp_nvram_finish_partition(part_header, len);
/* Generation */
stl_be_p(&data[20], 2);
diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index 4de5f705d8..eb42ea323f 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -31,6 +31,7 @@
#include "sysemu/block-backend.h"
#include "sysemu/device_tree.h"
#include "hw/sysbus.h"
+#include "hw/nvram/chrp_nvram.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
@@ -162,6 +163,11 @@ static void spapr_nvram_realize(VIOsPAPRDevice *dev, Error **errp)
error_setg(errp, "can't read spapr-nvram contents");
return;
}
+ } else if (nb_prom_envs > 0) {
+ /* Create a system partition to pass the -prom-env variables */
+ chrp_nvram_create_system_partition(nvram->buf, MIN_NVRAM_SIZE / 4);
+ chrp_nvram_create_free_partition(&nvram->buf[MIN_NVRAM_SIZE / 4],
+ nvram->size - MIN_NVRAM_SIZE / 4);
}
spapr_rtas_register(RTAS_NVRAM_FETCH, "nvram-fetch", rtas_nvram_fetch);
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-12 04:10:02 +0000