Broadcom BCM963xx boards have multiple nvram variants across different
SoCs with additional checksum fields added whenever the size of the
nvram was extended.
Add this structure as a header file so that multiple drivers and userspace
can use it.
Signed-off-by: Simon Arlott <si...@fire.lp0.eu>
---
v3: Fix includes/type names, add comments explaining the nvram struct.
v2: Use external struct bcm963xx_nvram definition for bcm963268part.
MAINTAINERS | 1 +
include/uapi/linux/bcm963xx_nvram.h | 53 +++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
create mode 100644 include/uapi/linux/bcm963xx_nvram.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 6b6d4e2e..abf18b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2393,6 +2393,7 @@ F: drivers/irqchip/irq-bcm63*
F: drivers/irqchip/irq-bcm7*
F: drivers/irqchip/irq-brcmstb*
F: include/linux/bcm63xx_wdt.h
+F: include/uapi/linux/bcm963xx_nvram.h
BROADCOM TG3 GIGABIT ETHERNET DRIVER
M: Prashant Sreedharan <prash...@broadcom.com>
diff --git a/include/uapi/linux/bcm963xx_nvram.h
b/include/uapi/linux/bcm963xx_nvram.h
new file mode 100644
index 0000000..2dcb307
--- /dev/null
+++ b/include/uapi/linux/bcm963xx_nvram.h
@@ -0,0 +1,53 @@
+#ifndef _UAPI__LINUX_BCM963XX_NVRAM_H__
+#define _UAPI__LINUX_BCM963XX_NVRAM_H__
+
+#include <linux/types.h>
+#include <linux/if_ether.h>
+
+/*
+ * Broadcom BCM963xx SoC board nvram data structure.
+ *
+ * The nvram structure varies in size depending on the SoC board version. Use
+ * the appropriate minimum BCM963XX_NVRAM_*_SIZE define for the information
+ * you need instead of sizeof(struct bcm963xx_nvram) as this may change.
+ *
+ * The "version" field value maps directly to the size and checksum names, e.g.
+ * version 4 uses "checksum_v4" and the data is BCM963XX_NVRAM_V4_SIZE bytes.
+ *
+ * Do not use the __reserved fields, especially not as an offset for CRC
+ * calculations (use BCM963XX_NVRAM_*_SIZE instead). These may be removed or
+ * repositioned.
+ */
+
+#define BCM963XX_NVRAM_V4_SIZE 300
+#define BCM963XX_NVRAM_V5_SIZE 1024
+#define BCM963XX_NVRAM_V6_SIZE BCM963XX_NVRAM_V5_SIZE
+#define BCM963XX_NVRAM_V7_SIZE 3072
+
+#define BCM963XX_NVRAM_NR_PARTS 5
+
+struct bcm963xx_nvram {
+ __u32 version;
+ char bootline[256];
+ char name[16];
+ __u32 main_tp_number;
+ __u32 psi_size;
+ __u32 mac_addr_count;
+ __u8 mac_addr_base[ETH_ALEN];
+ __u8 __reserved1[2];
+ __u32 checksum_v4;
+
+ __u8 __reserved2[292];
+ __u32 nand_part_offset[BCM963XX_NVRAM_NR_PARTS];
+ __u32 nand_part_size[BCM963XX_NVRAM_NR_PARTS];
+ __u8 __reserved3[388];
+ union {
+ __u32 checksum_v5;
+ __u32 checksum_v6;
+ };
+
+ __u8 __reserved4[2044];
+ __u32 checksum_v7;
+} __packed;
+
+#endif /* _UAPI__LINUX_BCM963XX_NVRAM_H__ */
--
2.1.4
--
Simon Arlott
--
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