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