85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
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* Copyright (c) 2009 Wind River Systems, Inc.
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* Tom Rix <Tom.Rix@windriver.com>
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*
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* Derived from board specific omap code by
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* Richard Woodruff <r-woodruff2@ti.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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#include <common.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/sys_info.h>
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#include <asm/io.h>
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#include <asm/arch/rev.h>
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/*
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* get_cpu_rev(void) - extract version info
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*/
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u32 get_cpu_rev(void)
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{
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u32 cpuid = 0;
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ctrl_id_t *id_base;
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/*
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* On ES1.0 the IDCODE register is not exposed on L4
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* so using CPU ID to differentiate between ES1.0 and > ES1.0.
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*/
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__asm__ __volatile__("mrc p15, 0, %0, c0, c0, 0":"=r" (cpuid));
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if ((cpuid & 0xf) == 0x0)
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return CPU_3XX_ES10;
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else {
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/* Decode the IDs on > ES1.0 */
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id_base = (ctrl_id_t *) OMAP34XX_ID_L4_IO_BASE;
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cpuid = (__raw_readl(&id_base->idcode) >> CPU_3XX_ID_SHIFT) & 0xf;
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/* Some early ES2.0 seem to report ID 0, fix this */
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if (cpuid == 0)
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cpuid = CPU_3XX_ES20;
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return cpuid;
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}
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}
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/*
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* dieid_num_r(void) - read and set die ID
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*/
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void dieid_num_r(void)
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{
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ctrl_id_t *id_base = (ctrl_id_t *)OMAP34XX_ID_L4_IO_BASE;
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char *uid_s, die_id[34];
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u32 id[4];
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memset(die_id, 0, sizeof(die_id));
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uid_s = getenv("dieid#");
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if (uid_s == NULL) {
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id[3] = __raw_readl(&id_base->die_id_0);
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id[2] = __raw_readl(&id_base->die_id_1);
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id[1] = __raw_readl(&id_base->die_id_2);
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id[0] = __raw_readl(&id_base->die_id_3);
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sprintf(die_id, "%08x%08x%08x%08x", id[0], id[1], id[2], id[3]);
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setenv("dieid#", die_id);
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uid_s = die_id;
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}
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}
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