diff options
Diffstat (limited to 'board/eric/init.S')
| -rw-r--r-- | board/eric/init.S | 516 |
1 files changed, 258 insertions, 258 deletions
diff --git a/board/eric/init.S b/board/eric/init.S index bdf90a5..9d4e7ff 100644 --- a/board/eric/init.S +++ b/board/eric/init.S @@ -42,169 +42,169 @@ #include <asm/mmu.h> - .globl ext_bus_cntlr_init + .globl ext_bus_cntlr_init ext_bus_cntlr_init: - mflr r4 /* save link register */ - bl ..getAddr + mflr r4 /* save link register */ + bl ..getAddr ..getAddr: - mflr r3 /* get address of ..getAddr */ - mtlr r4 /* restore link register */ - addi r4,0,14 /* set ctr to 10; used to prefetch */ - mtctr r4 /* 10 cache lines to fit this function */ - /* in cache (gives us 8x10=80 instrctns) */ + mflr r3 /* get address of ..getAddr */ + mtlr r4 /* restore link register */ + addi r4,0,14 /* set ctr to 10; used to prefetch */ + mtctr r4 /* 10 cache lines to fit this function */ + /* in cache (gives us 8x10=80 instrctns) */ ..ebcloop: - icbt r0,r3 /* prefetch cache line for addr in r3 */ - addi r3,r3,32 /* move to next cache line */ - bdnz ..ebcloop /* continue for 10 cache lines */ + icbt r0,r3 /* prefetch cache line for addr in r3 */ + addi r3,r3,32 /* move to next cache line */ + bdnz ..ebcloop /* continue for 10 cache lines */ - /*------------------------------------------------------------------- */ - /* Delay to ensure all accesses to ROM are complete before changing */ + /*------------------------------------------------------------------- */ + /* Delay to ensure all accesses to ROM are complete before changing */ /* bank 0 timings. 200usec should be enough. */ - /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */ - /*------------------------------------------------------------------- */ + /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */ + /*------------------------------------------------------------------- */ addis r3,0,0x0 - ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ - mtctr r3 + ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ + mtctr r3 ..spinlp: - bdnz ..spinlp /* spin loop */ - - /*----------------------------------------------------------------------- */ - /* Memory Bank 0 (Flash) initialization (from openbios) */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb0ap - mtdcr ebccfga,r4 - addis r4,0,CS0_AP@h - ori r4,r4,CS0_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb0cr - mtdcr ebccfga,r4 - addis r4,0,CS0_CR@h - ori r4,r4,CS0_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 1 (NVRAM/RTC) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb1ap - mtdcr ebccfga,r4 - addis r4,0,CS1_AP@h - ori r4,r4,CS1_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb1cr - mtdcr ebccfga,r4 - addis r4,0,CS1_CR@h - ori r4,r4,CS1_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 2 (A/D converter) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb2ap - mtdcr ebccfga,r4 - addis r4,0,CS2_AP@h - ori r4,r4,CS2_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb2cr - mtdcr ebccfga,r4 - addis r4,0,CS2_CR@h - ori r4,r4,CS2_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 3 (Ethernet PHY Reset) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb3ap - mtdcr ebccfga,r4 - addis r4,0,CS3_AP@h - ori r4,r4,CS3_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb3cr - mtdcr ebccfga,r4 - addis r4,0,CS3_CR@h - ori r4,r4,CS3_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 4 (PC-MIP PRSNT1#) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb4ap - mtdcr ebccfga,r4 - addis r4,0,CS4_AP@h - ori r4,r4,CS4_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb4cr - mtdcr ebccfga,r4 - addis r4,0,CS4_CR@h - ori r4,r4,CS4_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 5 (PC-MIP PRSNT2#) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb5ap - mtdcr ebccfga,r4 - addis r4,0,CS5_AP@h - ori r4,r4,CS5_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb5cr - mtdcr ebccfga,r4 - addis r4,0,CS5_CR@h - ori r4,r4,CS5_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 6 (CPU LED0) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb6ap - mtdcr ebccfga,r4 - addis r4,0,CS6_AP@h - ori r4,r4,CS6_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb6cr - mtdcr ebccfga,r4 - addis r4,0,CS6_CR@h - ori r4,r4,CS5_CR@l - mtdcr ebccfgd,r4 - - /*----------------------------------------------------------------------- */ - /* Memory Bank 7 (CPU LED1) initialization */ - /*----------------------------------------------------------------------- */ - - addi r4,0,pb7ap - mtdcr ebccfga,r4 - addis r4,0,CS7_AP@h - ori r4,r4,CS7_AP@l - mtdcr ebccfgd,r4 - - addi r4,0,pb7cr - mtdcr ebccfga,r4 - addis r4,0,CS7_CR@h - ori r4,r4,CS7_CR@l - mtdcr ebccfgd,r4 + bdnz ..spinlp /* spin loop */ + + /*----------------------------------------------------------------------- */ + /* Memory Bank 0 (Flash) initialization (from openbios) */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb0ap + mtdcr ebccfga,r4 + addis r4,0,CS0_AP@h + ori r4,r4,CS0_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb0cr + mtdcr ebccfga,r4 + addis r4,0,CS0_CR@h + ori r4,r4,CS0_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 1 (NVRAM/RTC) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb1ap + mtdcr ebccfga,r4 + addis r4,0,CS1_AP@h + ori r4,r4,CS1_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb1cr + mtdcr ebccfga,r4 + addis r4,0,CS1_CR@h + ori r4,r4,CS1_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 2 (A/D converter) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb2ap + mtdcr ebccfga,r4 + addis r4,0,CS2_AP@h + ori r4,r4,CS2_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb2cr + mtdcr ebccfga,r4 + addis r4,0,CS2_CR@h + ori r4,r4,CS2_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 3 (Ethernet PHY Reset) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb3ap + mtdcr ebccfga,r4 + addis r4,0,CS3_AP@h + ori r4,r4,CS3_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb3cr + mtdcr ebccfga,r4 + addis r4,0,CS3_CR@h + ori r4,r4,CS3_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 4 (PC-MIP PRSNT1#) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb4ap + mtdcr ebccfga,r4 + addis r4,0,CS4_AP@h + ori r4,r4,CS4_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb4cr + mtdcr ebccfga,r4 + addis r4,0,CS4_CR@h + ori r4,r4,CS4_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 5 (PC-MIP PRSNT2#) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb5ap + mtdcr ebccfga,r4 + addis r4,0,CS5_AP@h + ori r4,r4,CS5_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb5cr + mtdcr ebccfga,r4 + addis r4,0,CS5_CR@h + ori r4,r4,CS5_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 6 (CPU LED0) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb6ap + mtdcr ebccfga,r4 + addis r4,0,CS6_AP@h + ori r4,r4,CS6_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb6cr + mtdcr ebccfga,r4 + addis r4,0,CS6_CR@h + ori r4,r4,CS5_CR@l + mtdcr ebccfgd,r4 + + /*----------------------------------------------------------------------- */ + /* Memory Bank 7 (CPU LED1) initialization */ + /*----------------------------------------------------------------------- */ + + addi r4,0,pb7ap + mtdcr ebccfga,r4 + addis r4,0,CS7_AP@h + ori r4,r4,CS7_AP@l + mtdcr ebccfgd,r4 + + addi r4,0,pb7cr + mtdcr ebccfga,r4 + addis r4,0,CS7_CR@h + ori r4,r4,CS7_CR@l + mtdcr ebccfgd,r4 /* addis r4,r0,FPGA_BRDC@h */ -/* ori r4,r4,FPGA_BRDC@l */ -/* lbz r3,0(r4) //get FPGA board control reg */ -/* eieio */ -/* ori r3,r3,0x01 //set UART1 control to select CTS/RTS */ +/* ori r4,r4,FPGA_BRDC@l */ +/* lbz r3,0(r4) /###*get FPGA board control reg */ +/* eieio */ +/* ori r3,r3,0x01 /###*set UART1 control to select CTS/RTS */ /* stb r3,0(r4) */ nop /* pass2 DCR errata #8 */ - blr + blr /*----------------------------------------------------------------------------- */ /* Function: sdram_init */ @@ -213,56 +213,56 @@ ext_bus_cntlr_init: /* If we have two SDRAM banks, simply undef SINGLE_BANK (ROLF :-) */ /* It is assumed that a 32MB 12x8(2) SDRAM is used. */ /*----------------------------------------------------------------------------- */ - .globl sdram_init + .globl sdram_init sdram_init: mflr r31 #ifdef CFG_SDRAM_MANUALLY - /*------------------------------------------------------------------- */ - /* Set MB0CF for bank 0. (0-32MB) Address Mode 4 since 12x8(2) */ - /*------------------------------------------------------------------- */ - - addi r4,0,mem_mb0cf - mtdcr memcfga,r4 - addis r4,0,MB0CF@h - ori r4,r4,MB0CF@l - mtdcr memcfgd,r4 - - /*------------------------------------------------------------------- */ - /* Set MB1CF for bank 1. (32MB-64MB) Address Mode 4 since 12x8(2) */ - /*------------------------------------------------------------------- */ - - addi r4,0,mem_mb1cf - mtdcr memcfga,r4 - addis r4,0,MB1CF@h - ori r4,r4,MB1CF@l - mtdcr memcfgd,r4 - - /*------------------------------------------------------------------- */ - /* Set MB2CF for bank 2. off */ - /*------------------------------------------------------------------- */ - - addi r4,0,mem_mb2cf - mtdcr memcfga,r4 - addis r4,0,MB2CF@h - ori r4,r4,MB2CF@l - mtdcr memcfgd,r4 - - /*------------------------------------------------------------------- */ - /* Set MB3CF for bank 3. off */ - /*------------------------------------------------------------------- */ - - addi r4,0,mem_mb3cf - mtdcr memcfga,r4 - addis r4,0,MB3CF@h - ori r4,r4,MB3CF@l - mtdcr memcfgd,r4 - - /*------------------------------------------------------------------- */ - /* Set the SDRAM Timing reg, SDTR1 and the refresh timer reg, RTR. */ - /* To set the appropriate timings, we need to know the SDRAM speed. */ + /*------------------------------------------------------------------- */ + /* Set MB0CF for bank 0. (0-32MB) Address Mode 4 since 12x8(2) */ + /*------------------------------------------------------------------- */ + + addi r4,0,mem_mb0cf + mtdcr memcfga,r4 + addis r4,0,MB0CF@h + ori r4,r4,MB0CF@l + mtdcr memcfgd,r4 + + /*------------------------------------------------------------------- */ + /* Set MB1CF for bank 1. (32MB-64MB) Address Mode 4 since 12x8(2) */ + /*------------------------------------------------------------------- */ + + addi r4,0,mem_mb1cf + mtdcr memcfga,r4 + addis r4,0,MB1CF@h + ori r4,r4,MB1CF@l + mtdcr memcfgd,r4 + + /*------------------------------------------------------------------- */ + /* Set MB2CF for bank 2. off */ + /*------------------------------------------------------------------- */ + + addi r4,0,mem_mb2cf + mtdcr memcfga,r4 + addis r4,0,MB2CF@h + ori r4,r4,MB2CF@l + mtdcr memcfgd,r4 + + /*------------------------------------------------------------------- */ + /* Set MB3CF for bank 3. off */ + /*------------------------------------------------------------------- */ + + addi r4,0,mem_mb3cf + mtdcr memcfga,r4 + addis r4,0,MB3CF@h + ori r4,r4,MB3CF@l + mtdcr memcfgd,r4 + + /*------------------------------------------------------------------- */ + /* Set the SDRAM Timing reg, SDTR1 and the refresh timer reg, RTR. */ + /* To set the appropriate timings, we need to know the SDRAM speed. */ /* We can use the PLB speed since the SDRAM speed is the same as */ /* the PLB speed. The PLB speed is the FBK divider times the */ /* 405GP reference clock, which on the Walnut board is 33Mhz. */ @@ -270,86 +270,86 @@ sdram_init: /* 100Mhz; if FBK is 3, SDRAM is 133Mhz. */ /* NOTE: The Walnut board supports SDRAM speeds of 66Mhz, 100Mhz, and */ /* maybe 133Mhz. */ - /*------------------------------------------------------------------- */ + /*------------------------------------------------------------------- */ - mfdcr r5,strap /* determine FBK divider */ - /* via STRAP reg to calc PLB speed. */ - /* SDRAM speed is the same as the PLB */ - /* speed. */ - rlwinm r4,r5,4,0x3 /* get FBK divide bits */ + mfdcr r5,strap /* determine FBK divider */ + /* via STRAP reg to calc PLB speed. */ + /* SDRAM speed is the same as the PLB */ + /* speed. */ + rlwinm r4,r5,4,0x3 /* get FBK divide bits */ ..chk_66: - cmpi %cr0,0,r4,0x1 - bne ..chk_100 + cmpi %cr0,0,r4,0x1 + bne ..chk_100 addis r6,0,SDTR_66@h /* SDTR1 value for 66Mhz */ ori r6,r6,SDTR_66@l addis r7,0,RTR_66 /* RTR value for 66Mhz */ - b ..sdram_ok + b ..sdram_ok ..chk_100: - cmpi %cr0,0,r4,0x2 - bne ..chk_133 - addis r6,0,SDTR_100@h /* SDTR1 value for 100Mhz */ - ori r6,r6,SDTR_100@l - addis r7,0,RTR_100 /* RTR value for 100Mhz */ - b ..sdram_ok + cmpi %cr0,0,r4,0x2 + bne ..chk_133 + addis r6,0,SDTR_100@h /* SDTR1 value for 100Mhz */ + ori r6,r6,SDTR_100@l + addis r7,0,RTR_100 /* RTR value for 100Mhz */ + b ..sdram_ok ..chk_133: - addis r6,0,0x0107 /* SDTR1 value for 133Mhz */ - ori r6,r6,0x4015 - addis r7,0,0x07F0 /* RTR value for 133Mhz */ + addis r6,0,0x0107 /* SDTR1 value for 133Mhz */ + ori r6,r6,0x4015 + addis r7,0,0x07F0 /* RTR value for 133Mhz */ ..sdram_ok: - /*------------------------------------------------------------------- */ - /* Set SDTR1 */ - /*------------------------------------------------------------------- */ - addi r4,0,mem_sdtr1 - mtdcr memcfga,r4 - mtdcr memcfgd,r6 - - /*------------------------------------------------------------------- */ - /* Set RTR */ - /*------------------------------------------------------------------- */ - addi r4,0,mem_rtr - mtdcr memcfga,r4 - mtdcr memcfgd,r7 - - /*------------------------------------------------------------------- */ - /* Delay to ensure 200usec have elapsed since reset. Assume worst */ - /* case that the core is running 200Mhz: */ - /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */ - /*------------------------------------------------------------------- */ - addis r3,0,0x0000 - ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ - mtctr r3 + /*------------------------------------------------------------------- */ + /* Set SDTR1 */ + /*------------------------------------------------------------------- */ + addi r4,0,mem_sdtr1 + mtdcr memcfga,r4 + mtdcr memcfgd,r6 + + /*------------------------------------------------------------------- */ + /* Set RTR */ + /*------------------------------------------------------------------- */ + addi r4,0,mem_rtr + mtdcr memcfga,r4 + mtdcr memcfgd,r7 + + /*------------------------------------------------------------------- */ + /* Delay to ensure 200usec have elapsed since reset. Assume worst */ + /* case that the core is running 200Mhz: */ + /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */ + /*------------------------------------------------------------------- */ + addis r3,0,0x0000 + ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ + mtctr r3 ..spinlp2: - bdnz ..spinlp2 /* spin loop */ + bdnz ..spinlp2 /* spin loop */ - /*------------------------------------------------------------------- */ - /* Set memory controller options reg, MCOPT1. */ + /*------------------------------------------------------------------- */ + /* Set memory controller options reg, MCOPT1. */ /* Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst */ /* read/prefetch. */ - /*------------------------------------------------------------------- */ - addi r4,0,mem_mcopt1 - mtdcr memcfga,r4 - addis r4,0,0x8080 /* set DC_EN=1 */ - ori r4,r4,0x0000 - mtdcr memcfgd,r4 - - /*------------------------------------------------------------------- */ - /* Delay to ensure 10msec have elapsed since reset. This is */ - /* required for the MPC952 to stabalize. Assume worst */ - /* case that the core is running 200Mhz: */ - /* 200,000,000 (cycles/sec) X .010 (sec) = 0x1E8480 cycles */ - /* This delay should occur before accessing SDRAM. */ - /*------------------------------------------------------------------- */ - addis r3,0,0x001E - ori r3,r3,0x8480 /* ensure 10msec have passed since reset */ - mtctr r3 + /*------------------------------------------------------------------- */ + addi r4,0,mem_mcopt1 + mtdcr memcfga,r4 + addis r4,0,0x8080 /* set DC_EN=1 */ + ori r4,r4,0x0000 + mtdcr memcfgd,r4 + + /*------------------------------------------------------------------- */ + /* Delay to ensure 10msec have elapsed since reset. This is */ + /* required for the MPC952 to stabalize. Assume worst */ + /* case that the core is running 200Mhz: */ + /* 200,000,000 (cycles/sec) X .010 (sec) = 0x1E8480 cycles */ + /* This delay should occur before accessing SDRAM. */ + /*------------------------------------------------------------------- */ + addis r3,0,0x001E + ori r3,r3,0x8480 /* ensure 10msec have passed since reset */ + mtctr r3 ..spinlp3: - bdnz ..spinlp3 /* spin loop */ + bdnz ..spinlp3 /* spin loop */ #else /*fixme: do SDRAM Autoconfig from EEPROM here */ #endif - mtlr r31 /* restore lr */ - blr + mtlr r31 /* restore lr */ + blr |