Make fsl_ddr_sdram_set_lawbar() a weak function to allow board code to
override if desired.
Signed-off-by: Kumar Gala <[EMAIL PROTECTED]>
---
drivers/misc/fsl_law.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 63 insertions(+), 0 deletions(-)
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
index dca6a4d..f9bdf10 100644
--- a/drivers/misc/fsl_law.c
+++ b/drivers/misc/fsl_law.c
@@ -72,6 +72,69 @@ void print_laws(void)
return;
}
+#if defined(CONFIG_FSL_DDR1) || \
+ defined(CONFIG_FSL_DDR2) || \
+ defined(CONFIG_FSL_DDR3)
+#include <../cpu/mpc8xxx/fsl_ddr_sdram.h>
+
+void
+__fsl_ddr_sdram_set_lawbar(const common_timing_params_t *memctl_common_params,
+ unsigned int memctl_interleaved,
+ unsigned int ctrl_num)
+{
+ unsigned long law_base_address;
+ unsigned long memsize_MB;
+ unsigned int law_size;
+
+ /*
+ * If no DIMMs on this controller, do not proceed any further.
+ */
+ if (!memctl_common_params->ndimms_present) {
+ return;
+ }
+
+ law_base_address = memctl_common_params->base_address;
+
+ /*
+ * Compute LAWBARn[SIZE] value for 2**(SIZE + 1) bytes.
+ * If interleaving is used, the memory size must represent
+ * the combined total of both controllers.
+ * The first supported LAW size is 16M, at LAWAR_SIZE_16M == 23.
+ * Fnord.
+ */
+ memsize_MB = memctl_common_params->total_mem / 0x100000;
+ law_size = 19 + __ilog2(memsize_MB << memctl_interleaved);
+
+ if (ctrl_num == 0) {
+ /*
+ * Set up LAWBAR1 for DDR controller 1 space.
+ */
+ unsigned int lawbar1_target_id = memctl_interleaved
+ ? LAW_TRGT_IF_DDR_INTRLV : LAW_TRGT_IF_DDR_1;
+
+ set_law(1, law_base_address, law_size, lawbar1_target_id);
+ debug("ctl0 law_base_address = 0x%08X, law_size = 0x%x\n",
+ law_base_address, law_size);
+
+ } else if (ctrl_num == 1) {
+ /*
+ * Set up LAWBAR2 for DDR controller 2 space.
+ */
+ set_law(2, law_base_address, law_size, LAW_TRGT_IF_DDR_2);
+ debug("ctl1 law_base_address = 0x%08X, law_size = 0x%x\n",
+ law_base_address, law_size);
+
+ } else {
+ printf("unexpected controller number %u in
fsl_ddr_sdram_set_lawbar()\n", ctrl_num);
+ }
+}
+
+__attribute__((weak, alias("__fsl_ddr_sdram_set_lawbar"))) void
+fsl_ddr_sdram_set_lawbar(const common_timing_params_t *memctl_common_params,
+ unsigned int memctl_interleaved,
+ unsigned int ctrl_num);
+#endif
+
void init_laws(void)
{
int i;
--
1.5.5.1
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