projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f205cfaf TL |
1 | /* |
| 2 | * OMAP SRAM detection and management | |
| 3 | * | |
| 4 | * Copyright (C) 2005 Nokia Corporation | |
| 5 | * Written by Tony Lindgren <tony@atomide.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/kernel.h> | |
| 14 | #include <linux/init.h> | |
| 15 | #include <linux/io.h> | |
| 16 | ||
| 17 | #include <asm/fncpy.h> | |
| 18 | #include <asm/tlb.h> | |
| 19 | #include <asm/cacheflush.h> | |
| 20 | ||
| 21 | #include <asm/mach/map.h> | |
| 22 | ||
| 23 | #include "soc.h" | |
| 24 | #include "sram.h" | |
| 25 | ||
| 26 | #define OMAP1_SRAM_PA 0x20000000 | |
| 27 | #define SRAM_BOOTLOADER_SZ 0x80 | |
| 28 | ||
| 29 | /* | |
| 30 | * The amount of SRAM depends on the core type. | |
| 31 | * Note that we cannot try to test for SRAM here because writes | |
| 32 | * to secure SRAM will hang the system. Also the SRAM is not | |
| 33 | * yet mapped at this point. | |
| 34 | */ | |
| 35 | static void __init omap_detect_and_map_sram(void) | |
| 36 | { | |
| 37 | unsigned long omap_sram_skip = SRAM_BOOTLOADER_SZ; | |
| 38 | unsigned long omap_sram_start = OMAP1_SRAM_PA; | |
| 39 | unsigned long omap_sram_size; | |
| 40 | ||
| 41 | if (cpu_is_omap7xx()) | |
| 42 | omap_sram_size = 0x32000; /* 200K */ | |
| 43 | else if (cpu_is_omap15xx()) | |
| 44 | omap_sram_size = 0x30000; /* 192K */ | |
| 45 | else if (cpu_is_omap1610() || cpu_is_omap1611() || | |
| 46 | cpu_is_omap1621() || cpu_is_omap1710()) | |
| 47 | omap_sram_size = 0x4000; /* 16K */ | |
| 48 | else { | |
| 49 | pr_err("Could not detect SRAM size\n"); | |
| 50 | omap_sram_size = 0x4000; | |
| 51 | } | |
| 52 | ||
| 53 | omap_map_sram(omap_sram_start, omap_sram_size, | |
| 54 | omap_sram_skip, 1); | |
| 55 | } | |
| 56 | ||
| 57 | static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl); | |
| 58 | ||
| 59 | void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl) | |
| 60 | { | |
| 61 | BUG_ON(!_omap_sram_reprogram_clock); | |
| 62 | /* On 730, bit 13 must always be 1 */ | |
| 63 | if (cpu_is_omap7xx()) | |
| 64 | ckctl |= 0x2000; | |
| 65 | _omap_sram_reprogram_clock(dpllctl, ckctl); | |
| 66 | } | |
| 67 | ||
| 68 | int __init omap_sram_init(void) | |
| 69 | { | |
| 70 | omap_detect_and_map_sram(); | |
| 71 | _omap_sram_reprogram_clock = | |
| 72 | omap_sram_push(omap1_sram_reprogram_clock, | |
| 73 | omap1_sram_reprogram_clock_sz); | |
| 74 | ||
| 75 | return 0; | |
| 76 | } |