125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* (C) Copyright 2012 Teresa Gámez, Phytec Messtechnik GmbH
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* (C) Copyright 2012 Jan Luebbe <j.luebbe@pengutronix.de>
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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 <io.h>
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#include <net.h>
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#include <mach/am33xx-silicon.h>
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#include <mach/am33xx-clock.h>
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#include <mach/sys_info.h>
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#include <mach/xload.h>
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#include <mach/am33xx-generic.h>
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void __noreturn reset_cpu(unsigned long addr)
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{
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writel(AM33XX_PRM_RSTCTRL_RESET, AM33XX_PRM_RSTCTRL);
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while (1);
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}
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/**
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* @brief Get the upper address of current execution
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*
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* we can use this to figure out if we are running in SRAM /
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* XIP Flash or in SDRAM
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*
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* @return base address
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*/
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u32 get_base(void)
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{
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u32 val;
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__asm__ __volatile__("mov %0, pc \n":"=r"(val)::"memory");
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val &= 0xF0000000;
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val >>= 28;
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return val;
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}
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/**
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* @brief Are we running in Flash XIP?
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*
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* If the base is in GPMC address space, we probably are!
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*
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* @return 1 if we are running in XIP mode, else return 0
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*/
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u32 running_in_flash(void)
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{
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if (get_base() < 4)
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return 1; /* in flash */
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return 0; /* running in SRAM or SDRAM */
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}
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/**
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* @brief Are we running in OMAP internal SRAM?
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*
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* If in SRAM address, then yes!
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*
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* @return 1 if we are running in SRAM, else return 0
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*/
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u32 running_in_sram(void)
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{
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if (get_base() == 4)
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return 1; /* in SRAM */
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return 0; /* running in FLASH or SDRAM */
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}
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/**
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* @brief Are we running in SDRAM?
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*
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* if we are not in GPMC nor in SRAM address space,
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* we are in SDRAM execution area
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*
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* @return 1 if we are running from SDRAM, else return 0
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*/
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u32 running_in_sdram(void)
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{
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if (get_base() > 4)
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return 1; /* in sdram */
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return 0; /* running in SRAM or FLASH */
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}
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enum omap_boot_src am33xx_bootsrc(void)
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{
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return OMAP_BOOTSRC_MMC1; /* only MMC for now */
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}
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int am33xx_register_ethaddr(int eth_id, int mac_id)
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{
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void __iomem *mac_id_low = (void *)AM33XX_MAC_ID0_LO + mac_id * 8;
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void __iomem *mac_id_high = (void *)AM33XX_MAC_ID0_HI + mac_id * 8;
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uint8_t mac_addr[6];
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uint32_t mac_hi, mac_lo;
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mac_lo = readl(mac_id_low);
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mac_hi = readl(mac_id_high);
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mac_addr[0] = mac_hi & 0xff;
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mac_addr[1] = (mac_hi & 0xff00) >> 8;
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mac_addr[2] = (mac_hi & 0xff0000) >> 16;
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mac_addr[3] = (mac_hi & 0xff000000) >> 24;
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mac_addr[4] = mac_lo & 0xff;
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mac_addr[5] = (mac_lo & 0xff00) >> 8;
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if (is_valid_ether_addr(mac_addr)) {
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eth_register_ethaddr(eth_id, mac_addr);
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return 0;
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}
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return -ENODEV;
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}
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