77 строки
1.9 KiB
C
77 строки
1.9 KiB
C
/*
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* OMAP SRAM detection and management
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*
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* Copyright (C) 2005 Nokia Corporation
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* Written by Tony Lindgren <tony@atomide.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <asm/fncpy.h>
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#include <asm/tlb.h>
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#include <asm/cacheflush.h>
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#include <asm/mach/map.h>
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#include "soc.h"
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#include "sram.h"
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#define OMAP1_SRAM_PA 0x20000000
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#define SRAM_BOOTLOADER_SZ 0x80
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/*
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* The amount of SRAM depends on the core type.
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* Note that we cannot try to test for SRAM here because writes
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* to secure SRAM will hang the system. Also the SRAM is not
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* yet mapped at this point.
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*/
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static void __init omap_detect_and_map_sram(void)
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{
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unsigned long omap_sram_skip = SRAM_BOOTLOADER_SZ;
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unsigned long omap_sram_start = OMAP1_SRAM_PA;
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unsigned long omap_sram_size;
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if (cpu_is_omap7xx())
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omap_sram_size = 0x32000; /* 200K */
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else if (cpu_is_omap15xx())
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omap_sram_size = 0x30000; /* 192K */
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else if (cpu_is_omap1610() || cpu_is_omap1611() ||
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cpu_is_omap1621() || cpu_is_omap1710())
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omap_sram_size = 0x4000; /* 16K */
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else {
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pr_err("Could not detect SRAM size\n");
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omap_sram_size = 0x4000;
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}
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omap_map_sram(omap_sram_start, omap_sram_size,
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omap_sram_skip, 1);
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}
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static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
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void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
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{
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BUG_ON(!_omap_sram_reprogram_clock);
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/* On 730, bit 13 must always be 1 */
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if (cpu_is_omap7xx())
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ckctl |= 0x2000;
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_omap_sram_reprogram_clock(dpllctl, ckctl);
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}
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int __init omap_sram_init(void)
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{
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omap_detect_and_map_sram();
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_omap_sram_reprogram_clock =
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omap_sram_push(omap1_sram_reprogram_clock,
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omap1_sram_reprogram_clock_sz);
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return 0;
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}
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