diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c | 161 |
1 files changed, 89 insertions, 72 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c index 7d17e94615..6f168a72db 100644 --- a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c +++ b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c @@ -51,13 +51,24 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_mmu(void) static BSP_START_TEXT_SECTION void mpc55xx_start_internal_ram(void) { - /* Initialize internal SRAM to zero (ECC) */ - bsp_start_zero( - (char *) bsp_ram_start + MPC55XX_EARLY_STACK_SIZE, - (size_t) bsp_ram_size - MPC55XX_EARLY_STACK_SIZE - ); - #ifdef MPC55XX_HAS_SECOND_INTERNAL_RAM_AREA - bsp_start_zero(&bsp_ram_1_start [0], (size_t) bsp_ram_1_size); + #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT + /* Initialize internal SRAM to zero (ECC) */ + bsp_start_zero( + (char *) bsp_ram_start + MPC55XX_EARLY_STACK_SIZE, + (size_t) bsp_ram_size - MPC55XX_EARLY_STACK_SIZE + ); + #ifdef MPC55XX_HAS_SECOND_INTERNAL_RAM_AREA + bsp_start_zero(&bsp_ram_1_start [0], (size_t) bsp_ram_1_size); + #endif + #else + bsp_start_zero( + bsp_section_sbss_begin, + (size_t) bsp_section_sbss_size + ); + bsp_start_zero( + bsp_section_bss_begin, + (size_t) bsp_section_bss_size + ); #endif } @@ -76,40 +87,42 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_load_nocache_section(void) static BSP_START_TEXT_SECTION void mpc55xx_start_mode_change(void) { - #ifdef MPC55XX_HAS_MODE_CONTROL - uint32_t mctl_key1 = 0x5af0; - uint32_t mctl_key2 = 0xa50f; - int i = 0; - - /* Clear any pending RGM status */ - RGM.FES.R = 0xffff; - RGM.DES.R = 0xffff; - - /* Make sure XOSC and PLLs are on in RUN0 state */ - ME.DRUN_MC.R = 0x001f0074; - ME.RUN_MC [0].R = 0x001f0074; - - /* - * Make sure all peripherals are active in DRUN and RUN0 state. - * - * FIXME: This might be optimized to reduce power consumtion. - */ - for (i = 0; i < 8; ++i) { - ME_RUN_PC_32B_tag run_pc = { .R = ME.RUN_PC [i].R }; - - run_pc.B.DRUN = 1; - run_pc.B.RUN0 = 1; - - ME.RUN_PC [i].R = run_pc.R; - } - - /* Switch to RUN0 state */ - ME.MCTL.R = 0x40000000 | mctl_key1; - ME.MCTL.R = 0x40000000 | mctl_key2; - - while (ME.GS.B.S_MTRANS) { - /* Wait for mode switch to be completed */ - } + #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT + #ifdef MPC55XX_HAS_MODE_CONTROL + uint32_t mctl_key1 = 0x5af0; + uint32_t mctl_key2 = 0xa50f; + int i = 0; + + /* Clear any pending RGM status */ + RGM.FES.R = 0xffff; + RGM.DES.R = 0xffff; + + /* Make sure XOSC and PLLs are on in RUN0 state */ + ME.DRUN_MC.R = 0x001f0074; + ME.RUN_MC [0].R = 0x001f0074; + + /* + * Make sure all peripherals are active in DRUN and RUN0 state. + * + * FIXME: This might be optimized to reduce power consumtion. + */ + for (i = 0; i < 8; ++i) { + ME_RUN_PC_32B_tag run_pc = { .R = ME.RUN_PC [i].R }; + + run_pc.B.DRUN = 1; + run_pc.B.RUN0 = 1; + + ME.RUN_PC [i].R = run_pc.R; + } + + /* Switch to RUN0 state */ + ME.MCTL.R = 0x40000000 | mctl_key1; + ME.MCTL.R = 0x40000000 | mctl_key2; + + while (ME.GS.B.S_MTRANS) { + /* Wait for mode switch to be completed */ + } + #endif #endif } @@ -134,44 +147,48 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_siu(void) static BSP_START_TEXT_SECTION void mpc55xx_start_ebi_chip_select(void) { - #ifdef MPC55XX_HAS_EBI - size_t i = 0; + #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT + #ifdef MPC55XX_HAS_EBI + size_t i = 0; - for (i = 0; i < mpc55xx_start_config_ebi_cs_count [0]; ++i) { - EBI.CS [i] = mpc55xx_start_config_ebi_cs [i]; - } + for (i = 0; i < mpc55xx_start_config_ebi_cs_count [0]; ++i) { + EBI.CS [i] = mpc55xx_start_config_ebi_cs [i]; + } - for (i = 0; i < mpc55xx_start_config_ebi_cal_cs_count [0]; ++i) { - EBI.CAL_CS [i] = mpc55xx_start_config_ebi_cal_cs [i]; - } + for (i = 0; i < mpc55xx_start_config_ebi_cal_cs_count [0]; ++i) { + EBI.CAL_CS [i] = mpc55xx_start_config_ebi_cal_cs [i]; + } + #endif #endif } static BSP_START_TEXT_SECTION void mpc55xx_start_ebi(void) { - #if defined(MPC55XX_BOARD_GWLCFM) - /* - * init EBI for Muxed AD bus - */ - EBI.MCR.B.DBM = 1; - EBI.MCR.B.AD_MUX = 1; /* use multiplexed bus */ - EBI.MCR.B.D16_31 = 1; /* use lower AD bus */ - - SIU.ECCR.B.EBDF = 3; /* use CLK/4 as bus clock */ - #elif defined(MPC55XX_BOARD_MPC5674FEVB) - struct EBI_tag ebi = { - .MCR = { - .B = { - .ACGE = 0, - .MDIS = 0, - .D16_31 = 0, - .AD_MUX = 0, - .DBM = 0 - } - } - }; - - EBI.MCR.R = ebi.MCR.R; + #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT + #if defined(MPC55XX_BOARD_GWLCFM) + /* + * init EBI for Muxed AD bus + */ + EBI.MCR.B.DBM = 1; + EBI.MCR.B.AD_MUX = 1; /* use multiplexed bus */ + EBI.MCR.B.D16_31 = 1; /* use lower AD bus */ + + SIU.ECCR.B.EBDF = 3; /* use CLK/4 as bus clock */ + #elif defined(MPC55XX_BOARD_MPC5674FEVB) + struct EBI_tag ebi = { + .MCR = { + .B = { + .ACGE = 0, + .MDIS = 0, + .D16_31 = 0, + .AD_MUX = 0, + .DBM = 0 + } + } + }; + + EBI.MCR.R = ebi.MCR.R; + #endif #endif } |