69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
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/* $Id$ */
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/* Copyright 2000 AG Electronics Ltd. */
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/* This code is distributed without warranty under the GPL v2 (see COPYING) */
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#include <ppc.h>
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#include <ppcreg.h>
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#include <types.h>
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#include <string.h>
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#include <pci.h>
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#include <printk.h>
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#define ONEMEG 0x00100000
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#define HALFMEG 0x00080000
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unsigned long memory_base = 0;
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unsigned long memory_top = 0;
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unsigned long memory_size = 0;
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//extern char __heap_end[];
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extern unsigned mpc107_config_memory(void);
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unsigned config_memory(unsigned offset)
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{
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//extern char __start[];
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//extern char __bss_start[];
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//unsigned rom_image = (unsigned) __start & 0xfff00000;
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//unsigned physical = rom_image + offset;
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//unsigned codesize = (unsigned) __bss_start - rom_image;
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#if 0
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/* At this point, DBAT 0 is memory, 1 is variable, 2 is the rom image,
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and 3 is IO. */
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ppc_set_io_dbat_reloc(2, rom_image, physical, ONEMEG);
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ppc_set_io_dbat (3, 0xf0000000, 0x10000000);
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if ( rom_image != physical )
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ppc_set_ibats_reloc(rom_image, physical, ONEMEG);
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else
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ppc_set_ibats(physical, ONEMEG);
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printk_debug("bsp_init_memory...\n");
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#endif
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ppc_setup_cpu(1); /* icache enable = 1 */
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//ppc_enable_mmu();
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memory_size = mpc107_config_memory();
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/* If we have some working RAM, we copy the code and rodata into it.
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* This allows us to reprogram the flash later. */
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#if 0
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if (memory_size)
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{
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unsigned onemeg = memory_size - ONEMEG;
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ppc_set_mem_dbat_reloc(1, onemeg, onemeg, ONEMEG);
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memcpy((void *)onemeg, (void *)rom_image, codesize);
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memset((void *)(onemeg + codesize), 0, ONEMEG - codesize);
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ppc_set_ibats_reloc2(rom_image, physical, onemeg, ONEMEG);
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ppc_set_mem_dbat_reloc(2, rom_image, onemeg, ONEMEG);
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make_coherent((void *)onemeg, ONEMEG);
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}
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ppc_set_memory_dbat (memory_size);
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#endif
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//ppc_enable_dcache ();
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return memory_size;
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}
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