nb/intel/sandybridge/raminit: move ram training into seperate function
In order to add a fallback mechanism, move the ram training code into a new function. This function will be called multiple times and must return error or success to the calling function. Change-Id: I5ee1b3a528290d8252d236b9152b81291736958a Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/14169 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
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@ -3946,7 +3946,108 @@ static void restore_timings(ramctr_timing * ctrl)
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write32(DEFAULT_MCHBAR + 0x4ea8, 0);
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}
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void init_dram_ddr3(spd_raw_data * spds, int mobile, int min_tck,
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static int try_init_dram_ddr3(ramctr_timing *ctrl, int s3resume,
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int me_uma_size)
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{
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if (!s3resume) {
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/* Find fastest common supported parameters */
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dram_find_common_params(ctrl);
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dram_dimm_mapping(ctrl);
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}
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/* Set MCU frequency */
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dram_freq(ctrl);
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if (!s3resume) {
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/* Calculate timings */
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dram_timing(ctrl);
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}
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/* Set version register */
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MCHBAR32(0x5034) = 0xC04EB002;
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/* Enable crossover */
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dram_xover(ctrl);
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/* Set timing and refresh registers */
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dram_timing_regs(ctrl);
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/* Power mode preset */
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MCHBAR32(0x4e80) = 0x5500;
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/* Set scheduler parameters */
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MCHBAR32(0x4c20) = 0x10100005;
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/* Set cpu specific register */
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set_4f8c();
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/* Clear IO reset bit */
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MCHBAR32(0x5030) &= ~0x20;
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/* Set MAD-DIMM registers */
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dram_dimm_set_mapping(ctrl);
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printk(BIOS_DEBUG, "Done dimm mapping\n");
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/* Zone config */
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dram_zones(ctrl, 1);
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/* Set memory map */
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dram_memorymap(ctrl, me_uma_size);
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printk(BIOS_DEBUG, "Done memory map\n");
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/* Set IO registers */
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dram_ioregs(ctrl);
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printk(BIOS_DEBUG, "Done io registers\n");
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udelay(1);
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if (s3resume) {
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restore_timings(ctrl);
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} else {
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/* Do jedec ddr3 reset sequence */
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dram_jedecreset(ctrl);
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printk(BIOS_DEBUG, "Done jedec reset\n");
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/* MRS commands */
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dram_mrscommands(ctrl);
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printk(BIOS_DEBUG, "Done MRS commands\n");
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/* Prepare for memory training */
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prepare_training(ctrl);
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read_training(ctrl);
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write_training(ctrl);
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printram("CP5a\n");
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discover_edges(ctrl);
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printram("CP5b\n");
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command_training(ctrl);
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printram("CP5c\n");
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discover_edges_write(ctrl);
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discover_timC_write(ctrl);
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normalize_training(ctrl);
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}
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set_4008c(ctrl);
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write_controller_mr(ctrl);
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if (!s3resume) {
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channel_test(ctrl);
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}
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return 0;
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}
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void init_dram_ddr3(spd_raw_data *spds, int mobile, int min_tck,
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int s3resume)
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{
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int me_uma_size;
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@ -3994,111 +4095,18 @@ void init_dram_ddr3(spd_raw_data * spds, int mobile, int min_tck,
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struct mrc_data_container *mrc_cache;
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mrc_cache = find_current_mrc_cache();
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if (!mrc_cache || mrc_cache->mrc_data_size < sizeof (ctrl)) {
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if (!mrc_cache || (mrc_cache->mrc_data_size < sizeof(ctrl))) {
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/* Failed S3 resume, reset to come up cleanly */
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outb(0x6, 0xcf9);
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halt();
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}
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memcpy(&ctrl, mrc_cache->mrc_data, sizeof (ctrl));
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}
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if (!s3resume) {
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memcpy(&ctrl, mrc_cache->mrc_data, sizeof(ctrl));
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} else {
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/* Get DDR3 SPD data */
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dram_find_spds_ddr3(spds, &ctrl);
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/* Find fastest common supported parameters */
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dram_find_common_params(&ctrl);
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dram_dimm_mapping(&ctrl);
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}
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/* Set MCU frequency */
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dram_freq(&ctrl);
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if (!s3resume) {
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/* Calculate timings */
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dram_timing(&ctrl);
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}
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/* Set version register */
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MCHBAR32(0x5034) = 0xC04EB002;
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/* Enable crossover */
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dram_xover(&ctrl);
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/* Set timing and refresh registers */
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dram_timing_regs(&ctrl);
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/* Power mode preset */
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MCHBAR32(0x4e80) = 0x5500;
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/* Set scheduler parameters */
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MCHBAR32(0x4c20) = 0x10100005;
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/* Set cpu specific register */
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set_4f8c();
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/* Clear IO reset bit */
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MCHBAR32(0x5030) &= ~0x20;
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/* Set MAD-DIMM registers */
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dram_dimm_set_mapping(&ctrl);
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printk(BIOS_DEBUG, "Done dimm mapping\n");
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/* Zone config */
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dram_zones(&ctrl, 1);
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/* Set memory map */
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dram_memorymap(&ctrl, me_uma_size);
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printk(BIOS_DEBUG, "Done memory map\n");
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/* Set IO registers */
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dram_ioregs(&ctrl);
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printk(BIOS_DEBUG, "Done io registers\n");
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udelay(1);
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if (s3resume) {
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restore_timings(&ctrl);
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} else {
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/* Do jedec ddr3 reset sequence */
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dram_jedecreset(&ctrl);
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printk(BIOS_DEBUG, "Done jedec reset\n");
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/* MRS commands */
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dram_mrscommands(&ctrl);
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printk(BIOS_DEBUG, "Done MRS commands\n");
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/* Prepare for memory training */
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prepare_training(&ctrl);
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read_training(&ctrl);
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write_training(&ctrl);
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printram("CP5a\n");
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discover_edges(&ctrl);
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printram("CP5b\n");
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command_training(&ctrl);
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printram("CP5c\n");
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discover_edges_write(&ctrl);
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discover_timC_write(&ctrl);
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normalize_training(&ctrl);
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}
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set_4008c(&ctrl);
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write_controller_mr(&ctrl);
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if (!s3resume) {
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channel_test(&ctrl);
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}
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try_init_dram_ddr3(&ctrl, s3resume, me_uma_size);
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/* FIXME: should be hardware revision-dependent. */
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write32(DEFAULT_MCHBAR + 0x5024, 0x00a030ce);
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