add CONFIG_BOOTCOUNT_LIMIT feature for 8360 CPU.
The bootcounter uses 8 bytes from the muram, because no other memory was found on this CPU for the bootcount feature. So we must correct the muram size in DTS before booting Linux.
This feature is actual only implemented for MPC8360, because not all 83xx CPU have qe, and therefore no muram, which this feature uses.
Signed-off-by: Heiko Schocher hs@denx.de --- changes since v1: - added comments from Kim Philips
cpu/mpc83xx/cpu.c | 34 ++++++++++++++++++++++++++++++++++ cpu/mpc83xx/fdt.c | 18 ++++++++++++++++++ 2 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c index 9e0a05d..876f5c7 100644 --- a/cpu/mpc83xx/cpu.c +++ b/cpu/mpc83xx/cpu.c @@ -35,6 +35,10 @@ #include <tsec.h> #include <netdev.h> #include <fsl_esdhc.h> +#ifdef CONFIG_BOOTCOUNT_LIMIT +#include <asm/immap_qe.h> +#include <asm/io.h> +#endif
DECLARE_GLOBAL_DATA_PTR;
@@ -399,3 +403,33 @@ int cpu_mmc_init(bd_t *bis) return 0; #endif } + +#ifdef CONFIG_BOOTCOUNT_LIMIT + +#if !defined(CONFIG_MPC8360) +#error "CONFIG_BOOTCOUNT_LIMIT only for MPC8360 implemented" +#endif + +#if !defined(CONFIG_BOOTCOUNT_ADDR) +#define CONFIG_BOOTCOUNT_ADDR (0x110000 + QE_MURAM_SIZE - 2 * sizeof(unsigned long)) +#endif + +#include <asm/io.h> + +void bootcount_store (ulong a) +{ + void *reg = (void *)(CONFIG_SYS_IMMR + CONFIG_BOOTCOUNT_ADDR); + out_be32 (reg, a); + out_be32 (reg + 4, BOOTCOUNT_MAGIC); +} + +ulong bootcount_load (void) +{ + void *reg = (void *)(CONFIG_SYS_IMMR + CONFIG_BOOTCOUNT_ADDR); + + if (in_be32 (reg + 4) != BOOTCOUNT_MAGIC) + return 0; + else + return in_be32 (reg); +} +#endif /* CONFIG_BOOTCOUNT_LIMIT */ diff --git a/cpu/mpc83xx/fdt.c b/cpu/mpc83xx/fdt.c index f890775..4cc9047 100644 --- a/cpu/mpc83xx/fdt.c +++ b/cpu/mpc83xx/fdt.c @@ -32,6 +32,20 @@ extern void ft_qe_setup(void *blob);
DECLARE_GLOBAL_DATA_PTR;
+#if defined(CONFIG_BOOTCOUNT_LIMIT) && defined(CONFIG_MPC8360) +#include <asm/immap_qe.h> + +void fdt_fixup_muram (void *blob) +{ + ulong data[2]; + + data[0] = 0; + data[1] = QE_MURAM_SIZE - 2 * sizeof(unsigned long); + do_fixup_by_path(blob, "/qe/muram/data-only", "reg", + data, sizeof (data), 0); +} +#endif + void ft_cpu_setup(void *blob, bd_t *bd) { immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; @@ -83,4 +97,8 @@ void ft_cpu_setup(void *blob, bd_t *bd) #endif
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize); + +#if defined(CONFIG_BOOTCOUNT_LIMIT) + fdt_fixup_muram (blob); +#endif }