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096ca838b5
This function consists entirely of inline asm statements, so writing it directly in a .S file is simpler. Additionally, the inline asm is not safe as is, since registers are not guaranteed to be preserved between asm() statements. Signed-off-by: Mans Rullgard <mans@mansr.com> Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
294 lines
8.8 KiB
C
294 lines
8.8 KiB
C
/*
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*
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* Common board functions for OMAP3 based boards.
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*
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* (C) Copyright 2004-2008
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Sunil Kumar <sunilsaini05@gmail.com>
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* Shashi Ranjan <shashiranjanmca05@gmail.com>
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*
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* Derived from Beagle Board and 3430 SDP code by
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* Richard Woodruff <r-woodruff2@ti.com>
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* Syed Mohammed Khasim <khasim@ti.com>
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*
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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/io.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/mem.h>
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#include <asm/cache.h>
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extern omap3_sysinfo sysinfo;
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/******************************************************************************
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* Routine: delay
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* Description: spinning delay to use before udelay works
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*****************************************************************************/
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static inline void delay(unsigned long loops)
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{
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__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
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"bne 1b":"=r" (loops):"0"(loops));
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}
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/******************************************************************************
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* Routine: secure_unlock
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* Description: Setup security registers for access
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* (GP Device only)
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*****************************************************************************/
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void secure_unlock_mem(void)
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{
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struct pm *pm_rt_ape_base = (struct pm *)PM_RT_APE_BASE_ADDR_ARM;
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struct pm *pm_gpmc_base = (struct pm *)PM_GPMC_BASE_ADDR_ARM;
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struct pm *pm_ocm_ram_base = (struct pm *)PM_OCM_RAM_BASE_ADDR_ARM;
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struct pm *pm_iva2_base = (struct pm *)PM_IVA2_BASE_ADDR_ARM;
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struct sms *sms_base = (struct sms *)OMAP34XX_SMS_BASE;
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/* Protection Module Register Target APE (PM_RT) */
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writel(UNLOCK_1, &pm_rt_ape_base->req_info_permission_1);
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writel(UNLOCK_1, &pm_rt_ape_base->read_permission_0);
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writel(UNLOCK_1, &pm_rt_ape_base->wirte_permission_0);
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writel(UNLOCK_2, &pm_rt_ape_base->addr_match_1);
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writel(UNLOCK_3, &pm_gpmc_base->req_info_permission_0);
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writel(UNLOCK_3, &pm_gpmc_base->read_permission_0);
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writel(UNLOCK_3, &pm_gpmc_base->wirte_permission_0);
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writel(UNLOCK_3, &pm_ocm_ram_base->req_info_permission_0);
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writel(UNLOCK_3, &pm_ocm_ram_base->read_permission_0);
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writel(UNLOCK_3, &pm_ocm_ram_base->wirte_permission_0);
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writel(UNLOCK_2, &pm_ocm_ram_base->addr_match_2);
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/* IVA Changes */
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writel(UNLOCK_3, &pm_iva2_base->req_info_permission_0);
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writel(UNLOCK_3, &pm_iva2_base->read_permission_0);
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writel(UNLOCK_3, &pm_iva2_base->wirte_permission_0);
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/* SDRC region 0 public */
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writel(UNLOCK_1, &sms_base->rg_att0);
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}
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/******************************************************************************
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* Routine: secureworld_exit()
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* Description: If chip is EMU and boot type is external
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* configure secure registers and exit secure world
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* general use.
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*****************************************************************************/
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void secureworld_exit()
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{
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unsigned long i;
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/* configrue non-secure access control register */
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__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 2":"=r"(i));
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/* enabling co-processor CP10 and CP11 accesses in NS world */
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__asm__ __volatile__("orr %0, %0, #0xC00":"=r"(i));
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/*
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* allow allocation of locked TLBs and L2 lines in NS world
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* allow use of PLE registers in NS world also
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*/
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__asm__ __volatile__("orr %0, %0, #0x70000":"=r"(i));
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__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 2":"=r"(i));
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/* Enable ASA in ACR register */
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__asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
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__asm__ __volatile__("orr %0, %0, #0x10":"=r"(i));
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__asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));
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/* Exiting secure world */
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__asm__ __volatile__("mrc p15, 0, %0, c1, c1, 0":"=r"(i));
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__asm__ __volatile__("orr %0, %0, #0x31":"=r"(i));
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__asm__ __volatile__("mcr p15, 0, %0, c1, c1, 0":"=r"(i));
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}
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/******************************************************************************
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* Routine: try_unlock_sram()
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* Description: If chip is GP/EMU(special) type, unlock the SRAM for
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* general use.
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*****************************************************************************/
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void try_unlock_memory()
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{
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int mode;
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int in_sdram = is_running_in_sdram();
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/*
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* if GP device unlock device SRAM for general use
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* secure code breaks for Secure/Emulation device - HS/E/T
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*/
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mode = get_device_type();
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if (mode == GP_DEVICE)
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secure_unlock_mem();
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/*
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* If device is EMU and boot is XIP external booting
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* Unlock firewalls and disable L2 and put chip
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* out of secure world
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*
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* Assuming memories are unlocked by the demon who put us in SDRAM
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*/
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if ((mode <= EMU_DEVICE) && (get_boot_type() == 0x1F)
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&& (!in_sdram)) {
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secure_unlock_mem();
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secureworld_exit();
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}
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return;
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}
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/******************************************************************************
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* Routine: s_init
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* Description: Does early system init of muxing and clocks.
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* - Called path is with SRAM stack.
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*****************************************************************************/
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void s_init(void)
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{
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int in_sdram = is_running_in_sdram();
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watchdog_init();
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try_unlock_memory();
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/*
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* Right now flushing at low MPU speed.
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* Need to move after clock init
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*/
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invalidate_dcache(get_device_type());
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#ifndef CONFIG_ICACHE_OFF
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icache_enable();
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#endif
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#ifdef CONFIG_L2_OFF
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l2_cache_disable();
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#else
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l2_cache_enable();
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#endif
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/*
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* Writing to AuxCR in U-boot using SMI for GP DEV
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* Currently SMI in Kernel on ES2 devices seems to have an issue
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* Once that is resolved, we can postpone this config to kernel
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*/
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if (get_device_type() == GP_DEVICE)
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setup_auxcr();
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set_muxconf_regs();
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delay(100);
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prcm_init();
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per_clocks_enable();
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if (!in_sdram)
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mem_init();
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}
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/******************************************************************************
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* Routine: wait_for_command_complete
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* Description: Wait for posting to finish on watchdog
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*****************************************************************************/
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void wait_for_command_complete(struct watchdog *wd_base)
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{
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int pending = 1;
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do {
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pending = readl(&wd_base->wwps);
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} while (pending);
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}
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/******************************************************************************
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* Routine: watchdog_init
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* Description: Shut down watch dogs
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*****************************************************************************/
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void watchdog_init(void)
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{
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struct watchdog *wd2_base = (struct watchdog *)WD2_BASE;
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struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
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/*
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* There are 3 watch dogs WD1=Secure, WD2=MPU, WD3=IVA. WD1 is
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* either taken care of by ROM (HS/EMU) or not accessible (GP).
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* We need to take care of WD2-MPU or take a PRCM reset. WD3
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* should not be running and does not generate a PRCM reset.
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*/
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sr32(&prcm_base->fclken_wkup, 5, 1, 1);
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sr32(&prcm_base->iclken_wkup, 5, 1, 1);
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wait_on_value(ST_WDT2, 0x20, &prcm_base->idlest_wkup, 5);
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writel(WD_UNLOCK1, &wd2_base->wspr);
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wait_for_command_complete(wd2_base);
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writel(WD_UNLOCK2, &wd2_base->wspr);
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}
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/******************************************************************************
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* Dummy function to handle errors for EABI incompatibility
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*****************************************************************************/
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void abort(void)
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{
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}
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#ifdef CONFIG_NAND_OMAP_GPMC
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/******************************************************************************
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* OMAP3 specific command to switch between NAND HW and SW ecc
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*****************************************************************************/
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static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
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{
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if (argc != 2)
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goto usage;
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if (strncmp(argv[1], "hw", 2) == 0)
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omap_nand_switch_ecc(1);
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else if (strncmp(argv[1], "sw", 2) == 0)
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omap_nand_switch_ecc(0);
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else
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goto usage;
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return 0;
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usage:
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printf ("Usage: nandecc %s\n", cmdtp->usage);
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return 1;
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}
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U_BOOT_CMD(
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nandecc, 2, 1, do_switch_ecc,
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"switch OMAP3 NAND ECC calculation algorithm",
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"[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm"
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);
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#endif /* CONFIG_NAND_OMAP_GPMC */
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#ifdef CONFIG_DISPLAY_BOARDINFO
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/**
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* Print board information
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*/
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int checkboard (void)
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{
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char *mem_s ;
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if (is_mem_sdr())
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mem_s = "mSDR";
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else
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mem_s = "LPDDR";
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printf("%s + %s/%s\n", sysinfo.board_string, mem_s,
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sysinfo.nand_string);
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return 0;
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}
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#endif /* CONFIG_DISPLAY_BOARDINFO */
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