mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-08 20:26:17 +09:00
9171fc8172
All of the duplicated code for Blackfin processors and boot modes have been unified. After all, the core is the same for all processors, just the peripheral set differs (which gets handled in the drivers). Signed-off-by: Mike Frysinger <vapier@gentoo.org>
142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
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* U-boot - cpu.c CPU specific functions
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*
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* Copyright (c) 2005-2008 Analog Devices Inc.
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*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/blackfin.h>
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#include <asm/cplb.h>
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#include <asm/mach-common/bits/core.h>
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#include <asm/mach-common/bits/mpu.h>
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#include <asm/mach-common/bits/trace.h>
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#include "cpu.h"
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#include "serial.h"
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void icache_enable(void)
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{
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bfin_write_IMEM_CONTROL(bfin_read_IMEM_CONTROL() | (IMC | ENICPLB));
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SSYNC();
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}
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void icache_disable(void)
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{
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bfin_write_IMEM_CONTROL(bfin_read_IMEM_CONTROL() & ~(IMC | ENICPLB));
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SSYNC();
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}
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int icache_status(void)
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{
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return bfin_read_IMEM_CONTROL() & ENICPLB;
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}
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void dcache_enable(void)
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{
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bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() | (ACACHE_BCACHE | ENDCPLB | PORT_PREF0));
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SSYNC();
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}
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void dcache_disable(void)
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{
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bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() & ~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0));
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SSYNC();
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}
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int dcache_status(void)
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{
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return bfin_read_DMEM_CONTROL() & ENDCPLB;
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}
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__attribute__ ((__noreturn__))
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void cpu_init_f(ulong bootflag, ulong loaded_from_ldr)
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{
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/* Build a NOP slide over the LDR jump block. Whee! */
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serial_early_puts("NOP Slide\n");
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char nops[0xC];
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memset(nops, 0x00, sizeof(nops));
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extern char _stext_l1;
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memcpy(&_stext_l1 - sizeof(nops), nops, sizeof(nops));
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if (!loaded_from_ldr) {
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/* Relocate sections into L1 if the LDR didn't do it -- don't
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* check length because the linker script does the size
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* checking at build time.
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*/
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serial_early_puts("L1 Relocate\n");
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extern char _stext_l1, _etext_l1, _stext_l1_lma;
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memcpy(&_stext_l1, &_stext_l1_lma, (&_etext_l1 - &_stext_l1));
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extern char _sdata_l1, _edata_l1, _sdata_l1_lma;
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memcpy(&_sdata_l1, &_sdata_l1_lma, (&_edata_l1 - &_sdata_l1));
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}
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#if defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__)
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/* The BF537 bootrom will reset the EBIU_AMGCTL register on us
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* after it has finished loading the LDR. So configure it again.
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*/
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else
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bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
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#endif
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#ifdef CONFIG_DEBUG_DUMP
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/* Turn on hardware trace buffer */
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bfin_write_TBUFCTL(TBUFPWR | TBUFEN);
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#endif
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#ifndef CONFIG_PANIC_HANG
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/* Reset upon a double exception rather than just hanging.
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* Do not do bfin_read on SWRST as that will reset status bits.
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*/
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bfin_write_SWRST(DOUBLE_FAULT);
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#endif
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serial_early_puts("Board init flash\n");
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board_init_f(bootflag);
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}
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int exception_init(void)
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{
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bfin_write_EVT3(trap);
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return 0;
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}
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int irq_init(void)
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{
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#ifdef SIC_IMASK0
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bfin_write_SIC_IMASK0(0);
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bfin_write_SIC_IMASK1(0);
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# ifdef SIC_IMASK2
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bfin_write_SIC_IMASK2(0);
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# endif
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#elif defined(SICA_IMASK0)
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bfin_write_SICA_IMASK0(0);
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bfin_write_SICA_IMASK1(0);
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#else
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bfin_write_SIC_IMASK(0);
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#endif
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bfin_write_EVT2(evt_default); /* NMI */
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bfin_write_EVT5(evt_default); /* hardware error */
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bfin_write_EVT6(evt_default); /* core timer */
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bfin_write_EVT7(evt_default);
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bfin_write_EVT8(evt_default);
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bfin_write_EVT9(evt_default);
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bfin_write_EVT10(evt_default);
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bfin_write_EVT11(evt_default);
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bfin_write_EVT12(evt_default);
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bfin_write_EVT13(evt_default);
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bfin_write_EVT14(evt_default);
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bfin_write_EVT15(evt_default);
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bfin_write_ILAT(0);
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CSYNC();
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/* enable all interrupts except for core timer */
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irq_flags = 0xffffffbf;
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local_irq_enable();
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CSYNC();
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return 0;
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}
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