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https://github.com/brain-hackers/u-boot-brain
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1605cc9e1b
We really shouldn't be overwriting bat registers with translation enabled, especially when we're executing code using one of them for translating the current instruction stream. Instead, disable address translation while doing the final BAT setup. In order to do this, setup_bats has to move back to asm code, because we require translation to be enabled to have a stack for C code. The yucky thing about that is that the assembler doesn't like ULL so we have to switch to using HIGH/LOW pairs for physical addresses that are > 32 bits in length. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
/*
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* Copyright 2004,2009-2011 Freescale Semiconductor, Inc.
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* Jeff Brown
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* Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* cpu_init.c - low level cpu init
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*/
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#include <config.h>
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#include <common.h>
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#include <mpc86xx.h>
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#include <asm/mmu.h>
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#include <asm/fsl_law.h>
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#include <asm/fsl_serdes.h>
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#include <asm/mp.h>
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extern void srio_init(void);
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Breathe 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 cpu_init_f(void)
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{
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/* Pointer is writable since we allocated a register for it */
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gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
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/* Clear initial global data */
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memset ((void *) gd, 0, sizeof (gd_t));
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#ifdef CONFIG_FSL_LAW
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init_laws();
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#endif
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setup_bats();
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init_early_memctl_regs();
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#if defined(CONFIG_FSL_DMA)
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dma_init();
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#endif
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/* enable the timebase bit in HID0 */
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set_hid0(get_hid0() | 0x4000000);
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/* enable EMCP, SYNCBE | ABE bits in HID1 */
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set_hid1(get_hid1() | 0x80000C00);
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}
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/*
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* initialize higher level parts of CPU like timers
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*/
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int cpu_init_r(void)
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{
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/* needs to be in ram since code uses global static vars */
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fsl_serdes_init();
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#ifdef CONFIG_SYS_SRIO
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srio_init();
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#endif
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#if defined(CONFIG_MP)
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setup_mp();
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#endif
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return 0;
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}
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#ifdef CONFIG_ADDR_MAP
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/* Initialize address mapping array */
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void init_addr_map(void)
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{
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int i;
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ppc_bat_t bat = DBAT0;
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phys_size_t size;
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unsigned long upper, lower;
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for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++, bat++) {
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if (read_bat(bat, &upper, &lower) != -1) {
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if (!BATU_VALID(upper))
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size = 0;
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else
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size = BATU_SIZE(upper);
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addrmap_set_entry(BATU_VADDR(upper), BATL_PADDR(lower),
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size, i);
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}
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#ifdef CONFIG_HIGH_BATS
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/* High bats are not contiguous with low BAT numbers */
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if (bat == DBAT3)
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bat = DBAT4 - 1;
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#endif
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}
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}
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#endif
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