312 lines
11 KiB
C
312 lines
11 KiB
C
/*
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* (C) Copyright 2000
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* Rob Taylor. Flying Pig Systems. robt@flyingpig.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <mpc824x.h>
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#ifndef CONFIG_SYS_BANK0_ROW
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#define CONFIG_SYS_BANK0_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK1_ROW
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#define CONFIG_SYS_BANK1_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK2_ROW
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#define CONFIG_SYS_BANK2_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK3_ROW
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#define CONFIG_SYS_BANK3_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK4_ROW
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#define CONFIG_SYS_BANK4_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK5_ROW
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#define CONFIG_SYS_BANK5_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK6_ROW
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#define CONFIG_SYS_BANK6_ROW 0
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#endif
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#ifndef CONFIG_SYS_BANK7_ROW
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#define CONFIG_SYS_BANK7_ROW 0
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#endif
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#ifndef CONFIG_SYS_DBUS_SIZE2
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#define CONFIG_SYS_DBUS_SIZE2 0
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#endif
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/*
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* Breath some life into the CPU...
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*
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* Set up the memory map,
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* initialize a bunch of registers,
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*/
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void
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cpu_init_f (void)
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{
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register unsigned long val;
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CONFIG_WRITE_HALFWORD(PCICR, 0x06); /* Bus Master, respond to PCI memory space acesses*/
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/* CONFIG_WRITE_HALFWORD(PCISR, 0xffff); */ /*reset PCISR*/
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#if defined(CONFIG_MUSENKI)
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/* Why is this here, you ask? Try, just try setting 0x8000
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* in PCIACR with CONFIG_WRITE_HALFWORD()
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* this one was a stumper, and we are annoyed
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*/
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#define M_CONFIG_WRITE_HALFWORD( addr, data ) \
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__asm__ __volatile__(" \
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stw %2,0(%0)\n \
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sync\n \
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sth %3,2(%1)\n \
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sync\n \
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" \
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: /* no output */ \
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: "r" (CONFIG_ADDR), "r" (CONFIG_DATA), \
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"r" (PCISWAP(addr & ~3)), "r" (PCISWAP(data << 16)) \
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);
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M_CONFIG_WRITE_HALFWORD(PCIACR, 0x8000);
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#endif
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CONFIG_WRITE_BYTE(PCLSR, 0x8); /* set PCI cache line size */
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CONFIG_WRITE_BYTE (PLTR, 0x40); /* set PCI latency timer */
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/*
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* Note that although this bit is cleared after a hard reset, it
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* must be explicitly set and then cleared by software during
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* initialization in order to guarantee correct operation of the
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* DLL and the SDRAM_CLK[0:3] signals (if they are used).
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*/
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CONFIG_READ_BYTE (AMBOR, val);
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CONFIG_WRITE_BYTE(AMBOR, val & 0xDF);
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CONFIG_WRITE_BYTE(AMBOR, val | 0x20);
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CONFIG_WRITE_BYTE(AMBOR, val & 0xDF);
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#ifdef CONFIG_MPC8245
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/* silicon bug 28 MPC8245 */
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CONFIG_READ_BYTE(AMBOR,val);
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CONFIG_WRITE_BYTE(AMBOR,val|0x1);
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#if 0
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/*
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* The following bug only affects older (XPC8245) processors.
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* DMA transfers initiated by external devices get corrupted due
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* to a hardware scheduling problem.
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*
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* The effect is:
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* when transferring X words, the first 32 words are transferred
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* OK, the next 3 x 32 words are 'old' data (from previous DMA)
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* while the rest of the X words is xferred fine.
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*
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* Disabling 3 of the 4 32 word hardware buffers solves the problem
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* with no significant performance loss.
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*/
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CONFIG_READ_BYTE(PCMBCR,val);
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/* in order not to corrupt data which is being read over the PCI bus
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* with the PPC as slave, we need to reduce the number of PCMRBs to 1,
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* 4.11 in the processor user manual
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* */
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#if 1
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CONFIG_WRITE_BYTE(PCMBCR,(val|0xC0)); /* 1 PCMRB */
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#else
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CONFIG_WRITE_BYTE(PCMBCR,(val|0x80)); /* 2 PCMRBs */
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CONFIG_WRITE_BYTE(PCMBCR,(val|0x40)); /* 3 PCMRBs */
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/* default, 4 PCMRBs are used */
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#endif
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#endif
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#endif
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CONFIG_READ_WORD(PICR1, val);
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#if defined(CONFIG_MPC8240)
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CONFIG_WRITE_WORD( PICR1,
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(val & (PICR1_ADDRESS_MAP | PICR1_RCS0)) |
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PIRC1_MSK | PICR1_PROC_TYPE_603E |
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PICR1_FLASH_WR_EN | PICR1_MCP_EN |
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PICR1_CF_DPARK | PICR1_EN_PCS |
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PICR1_CF_APARK );
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#elif defined(CONFIG_MPC8245)
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CONFIG_WRITE_WORD( PICR1,
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(val & (PICR1_RCS0)) |
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PICR1_PROC_TYPE_603E |
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PICR1_FLASH_WR_EN | PICR1_MCP_EN |
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PICR1_CF_DPARK | PICR1_NO_BUSW_CK |
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PICR1_DEC| PICR1_CF_APARK | 0x10); /* 8245 UM says bit 4 must be set */
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#else
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#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
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#endif
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CONFIG_READ_WORD(PICR2, val);
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val= val & ~ (PICR2_CF_SNOOP_WS_MASK | PICR2_CF_APHASE_WS_MASK); /*mask off waitstate bits*/
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val |= PICR2_CF_SNOOP_WS_1WS | PICR2_CF_APHASE_WS_1WS; /*1 wait state*/
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CONFIG_WRITE_WORD(PICR2, val);
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CONFIG_WRITE_WORD(EUMBBAR, CONFIG_SYS_EUMB_ADDR);
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#ifndef CONFIG_SYS_RAMBOOT
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CONFIG_WRITE_WORD(MCCR1, (CONFIG_SYS_ROMNAL << MCCR1_ROMNAL_SHIFT) |
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(CONFIG_SYS_BANK0_ROW) |
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(CONFIG_SYS_BANK1_ROW << MCCR1_BANK1ROW_SHIFT) |
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(CONFIG_SYS_BANK2_ROW << MCCR1_BANK2ROW_SHIFT) |
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(CONFIG_SYS_BANK3_ROW << MCCR1_BANK3ROW_SHIFT) |
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(CONFIG_SYS_BANK4_ROW << MCCR1_BANK4ROW_SHIFT) |
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(CONFIG_SYS_BANK5_ROW << MCCR1_BANK5ROW_SHIFT) |
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(CONFIG_SYS_BANK6_ROW << MCCR1_BANK6ROW_SHIFT) |
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(CONFIG_SYS_BANK7_ROW << MCCR1_BANK7ROW_SHIFT) |
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(CONFIG_SYS_ROMFAL << MCCR1_ROMFAL_SHIFT));
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#endif
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#if defined(CONFIG_SYS_ASRISE) && defined(CONFIG_SYS_ASFALL)
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CONFIG_WRITE_WORD(MCCR2, CONFIG_SYS_REFINT << MCCR2_REFINT_SHIFT |
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CONFIG_SYS_ASRISE << MCCR2_ASRISE_SHIFT |
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CONFIG_SYS_ASFALL << MCCR2_ASFALL_SHIFT);
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#else
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CONFIG_WRITE_WORD(MCCR2, CONFIG_SYS_REFINT << MCCR2_REFINT_SHIFT);
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#endif
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#if defined(CONFIG_MPC8240)
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CONFIG_WRITE_WORD(MCCR3,
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(((CONFIG_SYS_BSTOPRE & 0x003c) >> 2) << MCCR3_BSTOPRE2TO5_SHIFT) |
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(CONFIG_SYS_REFREC << MCCR3_REFREC_SHIFT) |
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(CONFIG_SYS_RDLAT << MCCR3_RDLAT_SHIFT));
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#elif defined(CONFIG_MPC8245)
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CONFIG_WRITE_WORD(MCCR3,
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(((CONFIG_SYS_BSTOPRE & 0x003c) >> 2) << MCCR3_BSTOPRE2TO5_SHIFT) |
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(CONFIG_SYS_REFREC << MCCR3_REFREC_SHIFT));
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#else
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#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
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#endif
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/* this is gross. We think these should all be the same, and various boards
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* should define CONFIG_SYS_ACTORW to 0 if they don't want to set it, or even, if
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* its not set, we define it to zero in this file
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*/
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#if defined(CONFIG_CU824)
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CONFIG_WRITE_WORD(MCCR4,
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(CONFIG_SYS_PRETOACT << MCCR4_PRETOACT_SHIFT) |
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(CONFIG_SYS_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
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MCCR4_BIT21 |
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(CONFIG_SYS_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
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((CONFIG_SYS_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
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(((CONFIG_SYS_SDMODE_CAS_LAT <<4) | (CONFIG_SYS_SDMODE_WRAP <<3) |
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CONFIG_SYS_SDMODE_BURSTLEN) << MCCR4_SDMODE_SHIFT) |
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(CONFIG_SYS_ACTORW << MCCR4_ACTTORW_SHIFT) |
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(((CONFIG_SYS_BSTOPRE & 0x03c0) >> 6) << MCCR4_BSTOPRE6TO9_SHIFT));
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#elif defined(CONFIG_MPC8240)
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CONFIG_WRITE_WORD(MCCR4,
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(CONFIG_SYS_PRETOACT << MCCR4_PRETOACT_SHIFT) |
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(CONFIG_SYS_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
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MCCR4_BIT21 |
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(CONFIG_SYS_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
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((CONFIG_SYS_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
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(((CONFIG_SYS_SDMODE_CAS_LAT <<4) | (CONFIG_SYS_SDMODE_WRAP <<3) |
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(CONFIG_SYS_SDMODE_BURSTLEN)) <<MCCR4_SDMODE_SHIFT) |
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(((CONFIG_SYS_BSTOPRE & 0x03c0) >> 6) <<MCCR4_BSTOPRE6TO9_SHIFT ));
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#elif defined(CONFIG_MPC8245)
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CONFIG_READ_WORD(MCCR1, val);
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val &= MCCR1_DBUS_SIZE0; /* test for 64-bit mem bus */
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CONFIG_WRITE_WORD(MCCR4,
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(CONFIG_SYS_PRETOACT << MCCR4_PRETOACT_SHIFT) |
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(CONFIG_SYS_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
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(CONFIG_SYS_EXTROM ? MCCR4_EXTROM : 0) |
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(CONFIG_SYS_REGDIMM ? MCCR4_REGDIMM : 0) |
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(CONFIG_SYS_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
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((CONFIG_SYS_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
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(CONFIG_SYS_DBUS_SIZE2 << MCCR4_DBUS_SIZE2_SHIFT) |
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(((CONFIG_SYS_SDMODE_CAS_LAT <<4) | (CONFIG_SYS_SDMODE_WRAP <<3) |
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(val ? 2 : 3)) << MCCR4_SDMODE_SHIFT) |
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(CONFIG_SYS_ACTORW << MCCR4_ACTTORW_SHIFT) |
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(((CONFIG_SYS_BSTOPRE & 0x03c0) >> 6) <<MCCR4_BSTOPRE6TO9_SHIFT ));
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#else
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#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
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#endif
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CONFIG_WRITE_WORD(MSAR1,
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( (CONFIG_SYS_BANK0_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
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(((CONFIG_SYS_BANK1_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK2_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK3_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(EMSAR1,
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( (CONFIG_SYS_BANK0_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
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(((CONFIG_SYS_BANK1_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK2_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK3_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(MSAR2,
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( (CONFIG_SYS_BANK4_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
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(((CONFIG_SYS_BANK5_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK6_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK7_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(EMSAR2,
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( (CONFIG_SYS_BANK4_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
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(((CONFIG_SYS_BANK5_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK6_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK7_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(MEAR1,
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( (CONFIG_SYS_BANK0_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
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(((CONFIG_SYS_BANK1_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK2_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK3_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(EMEAR1,
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( (CONFIG_SYS_BANK0_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
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(((CONFIG_SYS_BANK1_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK2_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK3_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(MEAR2,
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( (CONFIG_SYS_BANK4_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
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(((CONFIG_SYS_BANK5_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK6_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK7_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
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CONFIG_WRITE_WORD(EMEAR2,
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( (CONFIG_SYS_BANK4_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
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(((CONFIG_SYS_BANK5_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
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(((CONFIG_SYS_BANK6_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
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(((CONFIG_SYS_BANK7_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
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CONFIG_WRITE_BYTE(ODCR, CONFIG_SYS_ODCR);
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#ifdef CONFIG_SYS_DLL_MAX_DELAY
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CONFIG_WRITE_BYTE(MIOCR1, CONFIG_SYS_DLL_MAX_DELAY); /* needed to make DLL lock */
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#endif
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#if defined(CONFIG_SYS_DLL_EXTEND) && defined(CONFIG_SYS_PCI_HOLD_DEL)
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CONFIG_WRITE_BYTE(PMCR2, CONFIG_SYS_DLL_EXTEND | CONFIG_SYS_PCI_HOLD_DEL);
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#endif
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#if defined(MIOCR2) && defined(CONFIG_SYS_SDRAM_DSCD)
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CONFIG_WRITE_BYTE(MIOCR2, CONFIG_SYS_SDRAM_DSCD); /* change memory input */
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#endif /* setup & hold time */
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CONFIG_WRITE_BYTE(MBER,
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CONFIG_SYS_BANK0_ENABLE |
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(CONFIG_SYS_BANK1_ENABLE << 1) |
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(CONFIG_SYS_BANK2_ENABLE << 2) |
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(CONFIG_SYS_BANK3_ENABLE << 3) |
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(CONFIG_SYS_BANK4_ENABLE << 4) |
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(CONFIG_SYS_BANK5_ENABLE << 5) |
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(CONFIG_SYS_BANK6_ENABLE << 6) |
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(CONFIG_SYS_BANK7_ENABLE << 7));
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#ifdef CONFIG_SYS_PGMAX
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CONFIG_WRITE_BYTE(MPMR, CONFIG_SYS_PGMAX);
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#endif
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/* ! Wait 200us before initialize other registers */
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/*FIXME: write a decent udelay wait */
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__asm__ __volatile__(
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" mtctr %0 \n \
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0: bdnz 0b\n"
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:
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: "r" (0x10000));
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CONFIG_READ_WORD(MCCR1, val);
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CONFIG_WRITE_WORD(MCCR1, val | MCCR1_MEMGO); /* set memory access going */
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__asm__ __volatile__("eieio");
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}
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/*
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* initialize higher level parts of CPU like time base and timers
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*/
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int cpu_init_r (void)
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{
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return (0);
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}
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