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Diffstat (limited to 'board/cray/L1/init.S')
| -rw-r--r-- | board/cray/L1/init.S | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/board/cray/L1/init.S b/board/cray/L1/init.S deleted file mode 100644 index d4723c733f..0000000000 --- a/board/cray/L1/init.S +++ /dev/null @@ -1,117 +0,0 @@ -/* - * SPDX-License-Identifier: GPL-2.0 IBM-pibs - */ - -/*----------------------------------------------------------------------------- */ -/* Function: ext_bus_cntlr_init */ -/* Description: Initializes the External Bus Controller for the external */ -/* peripherals. IMPORTANT: For pass1 this code must run from */ -/* cache since you can not reliably change a peripheral banks */ -/* timing register (pbxap) while running code from that bank. */ -/* For ex., since we are running from ROM on bank 0, we can NOT */ -/* execute the code that modifies bank 0 timings from ROM, so */ -/* we run it from cache. */ -/* Bank 0 - Flash and SRAM */ -/* Bank 1 - NVRAM/RTC */ -/* Bank 2 - Keyboard/Mouse controller */ -/* Bank 3 - IR controller */ -/* Bank 4 - not used */ -/* Bank 5 - not used */ -/* Bank 6 - not used */ -/* Bank 7 - FPGA registers */ -/*-----------------------------------------------------------------------------#include <config.h> */ -#include <asm/ppc4xx.h> - -#include <ppc_asm.tmpl> -#include <ppc_defs.h> - -#include <asm/cache.h> -#include <asm/mmu.h> - -/* CRAY - L1: only nominally a 'walnut', since ext.Bus.Cntlr is all empty */ -/* except for #1 which we use for DMA'ing to IOCA-like things, so the */ -/* control registers to set that up are determined by what we've */ -/* empirically discovered work there. */ - - .globl ext_bus_cntlr_init -ext_bus_cntlr_init: - 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) */ -..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 */ - - /*------------------------------------------------------------------- */ - /* 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 */ - /*------------------------------------------------------------------- */ - addis r3,0,0x0 - ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ - mtctr r3 -..spinlp: - bdnz ..spinlp /* spin loop */ - - - /*---------------------------------------------------------------------- */ - /* Peripheral Bank 0 (Flash) initialization */ - /*---------------------------------------------------------------------- */ - /* 0x7F8FFE80 slowest boot */ - addi r4,0,PB1AP - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x9B01 - ori r4,r4,0x5480 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB0CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0xFFC5 /* BAS=0xFFC,BS=0x4(4MB),BU=0x3(R/W), */ - ori r4,r4,0x8000 /* BW=0x0( 8 bits) */ - mtdcr EBC0_CFGDATA,r4 - - blr - - /*---------------------------------------------------------------------- */ - /* Peripheral Bank 1 (NVRAM/RTC) initialization */ - /* CRAY:the L1 has NOT this bank, it is tied to SV2/IOCA/etc/ instead */ - /* and we do DMA on it. The ConfigurationRegister part is threfore */ - /* almost arbitrary, except that our linux driver needs to know the */ - /* address, but it can query, it.. */ - /* */ - /* The AccessParameter is CRITICAL, */ - /* thouch, since it needs to agree with the electrical timings on the */ - /* IOCA parallel interface. That value is: 0x0185,4380 */ - /* BurstModeEnable BME=0 */ - /* TransferWait TWT=3 */ - /* ChipSelectOnTiming CSN=1 */ - /* OutputEnableOnTimimg OEN=1 */ - /* WriteByteEnableOnTiming WBN=1 */ - /* WriteByteEnableOffTiming WBF=0 */ - /* TransferHold TH=1 */ - /* ReadyEnable RE=1 */ - /* SampleOnReady SOR=1 */ - /* ByteEnableMode BEM=0 */ - /* ParityEnable PEN=0 */ - /* all reserved bits=0 */ - /*---------------------------------------------------------------------- */ - /*---------------------------------------------------------------------- */ - addi r4,0,PB1AP - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0185 /* hiword */ - ori r4,r4,0x4380 /* loword */ - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB1CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0xF001 /* BAS=0xF00,BS=0x0(1MB),BU=0x3(R/W), */ - ori r4,r4,0x8000 /* BW=0x0( 8 bits) */ - mtdcr EBC0_CFGDATA,r4 - - blr |