Make fsl_ddr_sdram_set_lawbar() a weak function to allow board code to override if desired.
Signed-off-by: Kumar Gala galak@kernel.crashing.org --- 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;