/* * Copyright (C) 2007 * Nobuhiro Iwamatsu * * Copyright (C) 2007 * Kenati Technologies, Inc. * * board/ms7722se/lowlevel_init.S * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include /* * Board specific low level init code, called _very_ early in the * startup sequence. Relocation to SDRAM has not happened yet, no * stack is available, bss section has not been initialised, etc. * * (Note: As no stack is available, no subroutines can be called...). */ .global lowlevel_init .text .align 2 lowlevel_init: mov.l CCR_A, r1 ! Address of Cache Control Register mov.l CCR_D, r0 ! Instruction Cache Invalidate mov.l r0, @r1 mov.l MMUCR_A, r1 ! Address of MMU Control Register mov.l MMUCR_D, r0 ! TI == TLB Invalidate bit mov.l r0, @r1 mov.l MSTPCR0_A, r1 ! Address of Power Control Register 0 mov.l MSTPCR0_D, r0 ! mov.l r0, @r1 mov.l MSTPCR2_A, r1 ! Address of Power Control Register 2 mov.l MSTPCR2_D, r0 ! mov.l r0, @r1 mov.l SBSCR_A, r1 ! mov.w SBSCR_D, r0 ! mov.w r0, @r1 mov.l PSCR_A, r1 ! mov.w PSCR_D, r0 ! mov.w r0, @r1 ! mov.l RWTCSR_A, r1 ! 0xA4520004 (Watchdog Control / Status Register) ! mov.w RWTCSR_D_1, r0 ! 0xA507 -> timer_STOP/WDT_CLK=max ! mov.w r0, @r1 mov.l RWTCNT_A, r1 ! 0xA4520000 (Watchdog Count Register) mov.w RWTCNT_D, r0 ! 0x5A00 -> Clear mov.w r0, @r1 mov.l RWTCSR_A, r1 ! 0xA4520004 (Watchdog Control / Status Register) mov.w RWTCSR_D_2, r0 ! 0xA504 -> timer_STOP/CLK=500ms mov.w r0, @r1 mov.l FRQCR_A, r1 ! 0xA4150000 Frequency control register mov.l FRQCR_D, r0 ! mov.l r0, @r1 mov.l CCR_A, r1 ! Address of Cache Control Register mov.l CCR_D_2, r0 ! ?? mov.l r0, @r1 bsc_init: mov.l PSELA_A, r1 mov.w PSELA_D, r0 mov.w r0, @r1 mov.l DRVCR_A, r1 mov.w DRVCR_D, r0 mov.w r0, @r1 mov.l PCCR_A, r1 mov.w PCCR_D, r0 mov.w r0, @r1 mov.l PECR_A, r1 mov.w PECR_D, r0 mov.w r0, @r1 mov.l PJCR_A, r1 mov.w PJCR_D, r0 mov.w r0, @r1 mov.l PXCR_A, r1 mov.w PXCR_D, r0 mov.w r0, @r1 mov.l CMNCR_A, r1 ! CMNCR address -> R1 mov.l CMNCR_D, r0 ! CMNCR data -> R0 mov.l r0, @r1 ! CMNCR set mov.l CS0BCR_A, r1 ! CS0BCR address -> R1 mov.l CS0BCR_D, r0 ! CS0BCR data -> R0 mov.l r0, @r1 ! CS0BCR set mov.l CS2BCR_A, r1 ! CS2BCR address -> R1 mov.l CS2BCR_D, r0 ! CS2BCR data -> R0 mov.l r0, @r1 ! CS2BCR set mov.l CS4BCR_A, r1 ! CS4BCR address -> R1 mov.l CS4BCR_D, r0 ! CS4BCR data -> R0 mov.l r0, @r1 ! CS4BCR set mov.l CS5ABCR_A, r1 ! CS5ABCR address -> R1 mov.l CS5ABCR_D, r0 ! CS5ABCR data -> R0 mov.l r0, @r1 ! CS5ABCR set mov.l CS5BBCR_A, r1 ! CS5BBCR address -> R1 mov.l CS5BBCR_D, r0 ! CS5BBCR data -> R0 mov.l r0, @r1 ! CS5BBCR set mov.l CS6ABCR_A, r1 ! CS6ABCR address -> R1 mov.l CS6ABCR_D, r0 ! CS6ABCR data -> R0 mov.l r0, @r1 ! CS6ABCR set mov.l CS0WCR_A, r1 ! CS0WCR address -> R1 mov.l CS0WCR_D, r0 ! CS0WCR data -> R0 mov.l r0, @r1 ! CS0WCR set mov.l CS2WCR_A, r1 ! CS2WCR address -> R1 mov.l CS2WCR_D, r0 ! CS2WCR data -> R0 mov.l r0, @r1 ! CS2WCR set mov.l CS4WCR_A, r1 ! CS4WCR address -> R1 mov.l CS4WCR_D, r0 ! CS4WCR data -> R0 mov.l r0, @r1 ! CS4WCR set mov.l CS5AWCR_A, r1 ! CS5AWCR address -> R1 mov.l CS5AWCR_D, r0 ! CS5AWCR data -> R0 mov.l r0, @r1 ! CS5AWCR set mov.l CS5BWCR_A, r1 ! CS5BWCR address -> R1 mov.l CS5BWCR_D, r0 ! CS5BWCR data -> R0 mov.l r0, @r1 ! CS5BWCR set mov.l CS6AWCR_A, r1 ! CS6AWCR address -> R1 mov.l CS6AWCR_D, r0 ! CS6AWCR data -> R0 mov.l r0, @r1 ! CS6AWCR set ! SDRAM initialization mov.l SDCR_A, r1 ! SB_SDCR address -> R1 mov.l SDCR_D, r0 ! SB_SDCR data -> R0 mov.l r0, @r1 ! SB_SDCR set mov.l SDWCR_A, r1 ! SB_SDWCR address -> R1 mov.l SDWCR_D, r0 ! SB_SDWCR data -> R0 mov.l r0, @r1 ! SB_SDWCR set mov.l SDPCR_A, r1 ! SB_SDPCR address -> R1 mov.l SDPCR_D, r0 ! SB_SDPCR data -> R0 mov.l r0, @r1 ! SB_SDPCR set mov.l RTCOR_A, r1 ! SB_RTCOR address -> R1 mov.l RTCOR_D, r0 ! SB_RTCOR data -> R0 mov.l r0, @r1 ! SB_RTCOR set mov.l RTCSR_A, r1 ! SB_RTCSR address -> R1 mov.l RTCSR_D, r0 ! SB_RTCSR data -> R0 mov.l r0, @r1 ! SB_RTCSR set mov.l SDMR3_A, r1 ! SDMR3 address -> R1 mov #0x00, r0 ! SDMR3 data -> R0 mov.b r0, @r1 ! SDMR3 set ! BL bit off (init = ON) (?!?) stc sr, r0 ! BL bit off(init=ON) mov.l SR_MASK_D, r1 and r1, r0 ldc r0, sr rts mov #0, r0 .align 2 CCR_A: .long CCR MMUCR_A: .long MMUCR MSTPCR0_A: .long MSTPCR0 MSTPCR2_A: .long MSTPCR2 SBSCR_A: .long SBSCR PSCR_A: .long PSCR RWTCSR_A: .long RWTCSR RWTCNT_A: .long RWTCNT FRQCR_A: .long FRQCR CCR_D: .long 0x00000800 CCR_D_2: .long 0x00000103 MMUCR_D: .long 0x00000004 MSTPCR0_D: .long 0x00001001 MSTPCR2_D: .long 0xffffffff FRQCR_D: .long 0x07022538 PSELA_A: .long 0xa405014E PSELA_D: .word 0x0A10 .align 2 DRVCR_A: .long 0xa405018A DRVCR_D: .word 0x0554 .align 2 PCCR_A: .long 0xa4050104 PCCR_D: .word 0x8800 .align 2 PECR_A: .long 0xa4050108 PECR_D: .word 0x0000 .align 2 PJCR_A: .long 0xa4050110 PJCR_D: .word 0x1000 .align 2 PXCR_A: .long 0xa4050148 PXCR_D: .word 0x0AAA .align 2 CMNCR_A: .long CMNCR CMNCR_D: .long 0x00000013 CS0BCR_A: .long CS0BCR ! Flash bank 1 CS0BCR_D: .long 0x24920400 CS2BCR_A: .long CS2BCR ! SRAM CS2BCR_D: .long 0x24920400 CS4BCR_A: .long CS4BCR ! FPGA, PCMCIA, USB, ext slot CS4BCR_D: .long 0x24920400 CS5ABCR_A: .long CS5ABCR ! Ext slot CS5ABCR_D: .long 0x24920400 CS5BBCR_A: .long CS5BBCR ! USB controller CS5BBCR_D: .long 0x24920400 CS6ABCR_A: .long CS6ABCR ! Ethernet CS6ABCR_D: .long 0x24920400 CS0WCR_A: .long CS0WCR CS0WCR_D: .long 0x00000300 CS2WCR_A: .long CS2WCR CS2WCR_D: .long 0x00000300 CS4WCR_A: .long CS4WCR CS4WCR_D: .long 0x00000300 CS5AWCR_A: .long CS5AWCR CS5AWCR_D: .long 0x00000300 CS5BWCR_A: .long CS5BWCR CS5BWCR_D: .long 0x00000300 CS6AWCR_A: .long CS6AWCR CS6AWCR_D: .long 0x00000300 SDCR_A: .long SBSC_SDCR SDCR_D: .long 0x00020809 SDWCR_A: .long SBSC_SDWCR SDWCR_D: .long 0x00164d0d SDPCR_A: .long SBSC_SDPCR SDPCR_D: .long 0x00000087 RTCOR_A: .long SBSC_RTCOR RTCOR_D: .long 0xA55A0034 RTCSR_A: .long SBSC_RTCSR RTCSR_D: .long 0xA55A0010 SDMR3_A: .long 0xFE500180 .align 1 SBSCR_D: .word 0x0040 PSCR_D: .word 0x0000 RWTCSR_D_1: .word 0xA507 RWTCSR_D_2: .word 0xA507 RWTCNT_D: .word 0x5A00 SR_MASK_D: .long 0xEFFFFF0F