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 | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 87 insertions(+), 0 deletions(-)
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
index 48ece4f..37af297 100644
--- a/drivers/misc/fsl_law.c
+++ b/drivers/misc/fsl_law.c
@@ -121,6 +121,93 @@ 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>
+
+/* use up to 2 LAWs for DDR, used the last available LAWs */
+int __set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
+{
+ u64 start_align, law_sz;
+ int law_sz_enc;
+
+ if (start == 0)
+ start_align = 1ull << (LAW_SIZE_32G + 1);
+ else
+ start_align = 1ull << (ffs64(start) - 1);
+ law_sz = min(start_align, sz);
+ law_sz_enc = __ilog2_u64(law_sz) - 1;
+
+ if (set_last_law(start, law_sz_enc, id) < 0)
+ return -1;
+
+ /* do we still have anything to map */
+ sz = sz - law_sz;
+ if (sz) {
+ start += law_sz;
+
+ start_align = 1ull << (ffs64(start) - 1);
+ law_sz = min(start_align, sz);
+ law_sz_enc = __ilog2_u64(law_sz) - 1;
+
+ if (set_last_law(start, law_sz_enc, id) < 0)
+ return -1;
+ } else {
+ return 0;
+ }
+
+ /* do we still have anything to map */
+ sz = sz - law_sz;
+ if (sz)
+ return 1;
+
+ return 0;
+}
+
+void
+__fsl_ddr_sdram_set_lawbar(const common_timing_params_t *memctl_common_params,
+ unsigned int memctl_interleaved,
+ unsigned int ctrl_num)
+{
+ /*
+ * If no DIMMs on this controller, do not proceed any further.
+ */
+ if (!memctl_common_params->ndimms_present) {
+ return;
+ }
+
+ if (ctrl_num == 0) {
+ /*
+ * Set up LAW for DDR controller 1 space.
+ */
+ unsigned int lawbar1_target_id = memctl_interleaved
+ ? LAW_TRGT_IF_DDR_INTRLV : LAW_TRGT_IF_DDR_1;
+
+ if (__set_ddr_laws(memctl_common_params->base_address,
+ memctl_common_params->total_mem,
+ lawbar1_target_id) < 0) {
+ printf("ERROR\n");
+ return ;
+ }
+ } else if (ctrl_num == 1) {
+ if (__set_ddr_laws(memctl_common_params->base_address,
+ memctl_common_params->total_mem,
+ LAW_TRGT_IF_DDR_2) < 0) {
+ printf("ERROR\n");
+ return ;
+ }
+ } 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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