| /* |
| * linux/arch/arm/plat-omap/sram.c |
| * |
| * OMAP SRAM detection and management |
| * |
| * Copyright (C) 2005 Nokia Corporation |
| * Written by Tony Lindgren <tony@atomide.com> |
| * |
| * Copyright (C) 2009 Texas Instruments |
| * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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. |
| */ |
| #undef DEBUG |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| |
| #include <asm/tlb.h> |
| #include <asm/cacheflush.h> |
| |
| #include <asm/mach/map.h> |
| |
| #include <plat/sram.h> |
| #include <plat/board.h> |
| #include <plat/cpu.h> |
| |
| #include "sram.h" |
| |
| /* XXX These "sideways" includes will disappear when sram.c becomes a driver */ |
| #include "../mach-omap2/iomap.h" |
| #include "../mach-omap2/prm2xxx_3xxx.h" |
| #include "../mach-omap2/sdrc.h" |
| |
| #define OMAP1_SRAM_PA 0x20000000 |
| #define OMAP2_SRAM_PUB_PA (OMAP2_SRAM_PA + 0xf800) |
| #define OMAP3_SRAM_PUB_PA (OMAP3_SRAM_PA + 0x8000) |
| #ifdef CONFIG_OMAP4_ERRATA_I688 |
| #define OMAP4_SRAM_PUB_PA OMAP4_SRAM_PA |
| #else |
| #define OMAP4_SRAM_PUB_PA (OMAP4_SRAM_PA + 0x4000) |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP2PLUS) |
| #define SRAM_BOOTLOADER_SZ 0x00 |
| #else |
| #define SRAM_BOOTLOADER_SZ 0x80 |
| #endif |
| |
| #define OMAP24XX_VA_REQINFOPERM0 OMAP2_L3_IO_ADDRESS(0x68005048) |
| #define OMAP24XX_VA_READPERM0 OMAP2_L3_IO_ADDRESS(0x68005050) |
| #define OMAP24XX_VA_WRITEPERM0 OMAP2_L3_IO_ADDRESS(0x68005058) |
| |
| #define OMAP34XX_VA_REQINFOPERM0 OMAP2_L3_IO_ADDRESS(0x68012848) |
| #define OMAP34XX_VA_READPERM0 OMAP2_L3_IO_ADDRESS(0x68012850) |
| #define OMAP34XX_VA_WRITEPERM0 OMAP2_L3_IO_ADDRESS(0x68012858) |
| #define OMAP34XX_VA_ADDR_MATCH2 OMAP2_L3_IO_ADDRESS(0x68012880) |
| #define OMAP34XX_VA_SMS_RG_ATT0 OMAP2_L3_IO_ADDRESS(0x6C000048) |
| |
| #define GP_DEVICE 0x300 |
| |
| #define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1))) |
| |
| static unsigned long omap_sram_start; |
| static void __iomem *omap_sram_base; |
| static unsigned long omap_sram_size; |
| static void __iomem *omap_sram_ceil; |
| |
| /* |
| * Depending on the target RAMFS firewall setup, the public usable amount of |
| * SRAM varies. The default accessible size for all device types is 2k. A GP |
| * device allows ARM11 but not other initiators for full size. This |
| * functionality seems ok until some nice security API happens. |
| */ |
| static int is_sram_locked(void) |
| { |
| if (OMAP2_DEVICE_TYPE_GP == omap_type()) { |
| /* RAMFW: R/W access to all initiators for all qualifier sets */ |
| if (cpu_is_omap242x()) { |
| __raw_writel(0xFF, OMAP24XX_VA_REQINFOPERM0); /* all q-vects */ |
| __raw_writel(0xCFDE, OMAP24XX_VA_READPERM0); /* all i-read */ |
| __raw_writel(0xCFDE, OMAP24XX_VA_WRITEPERM0); /* all i-write */ |
| } |
| if (cpu_is_omap34xx()) { |
| __raw_writel(0xFFFF, OMAP34XX_VA_REQINFOPERM0); /* all q-vects */ |
| __raw_writel(0xFFFF, OMAP34XX_VA_READPERM0); /* all i-read */ |
| __raw_writel(0xFFFF, OMAP34XX_VA_WRITEPERM0); /* all i-write */ |
| __raw_writel(0x0, OMAP34XX_VA_ADDR_MATCH2); |
| __raw_writel(0xFFFFFFFF, OMAP34XX_VA_SMS_RG_ATT0); |
| } |
| return 0; |
| } else |
| return 1; /* assume locked with no PPA or security driver */ |
| } |
| |
| /* |
| * 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_sram(void) |
| { |
| if (cpu_class_is_omap2()) { |
| if (is_sram_locked()) { |
| if (cpu_is_omap34xx()) { |
| omap_sram_start = OMAP3_SRAM_PUB_PA; |
| if ((omap_type() == OMAP2_DEVICE_TYPE_EMU) || |
| (omap_type() == OMAP2_DEVICE_TYPE_SEC)) { |
| omap_sram_size = 0x7000; /* 28K */ |
| } else { |
| omap_sram_size = 0x8000; /* 32K */ |
| } |
| } else if (cpu_is_omap44xx()) { |
| omap_sram_start = OMAP4_SRAM_PUB_PA; |
| omap_sram_size = 0xa000; /* 40K */ |
| } else { |
| omap_sram_start = OMAP2_SRAM_PUB_PA; |
| omap_sram_size = 0x800; /* 2K */ |
| } |
| } else { |
| if (cpu_is_omap34xx()) { |
| omap_sram_start = OMAP3_SRAM_PA; |
| omap_sram_size = 0x10000; /* 64K */ |
| } else if (cpu_is_omap44xx()) { |
| omap_sram_start = OMAP4_SRAM_PA; |
| omap_sram_size = 0xe000; /* 56K */ |
| } else { |
| omap_sram_start = OMAP2_SRAM_PA; |
| if (cpu_is_omap242x()) |
| omap_sram_size = 0xa0000; /* 640K */ |
| else if (cpu_is_omap243x()) |
| omap_sram_size = 0x10000; /* 64K */ |
| } |
| } |
| } else { |
| omap_sram_start = OMAP1_SRAM_PA; |
| |
| 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; |
| } |
| } |
| } |
| |
| /* |
| * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early. |
| */ |
| static void __init omap_map_sram(void) |
| { |
| int cached = 1; |
| |
| if (omap_sram_size == 0) |
| return; |
| |
| #ifdef CONFIG_OMAP4_ERRATA_I688 |
| omap_sram_start += PAGE_SIZE; |
| omap_sram_size -= SZ_16K; |
| #endif |
| if (cpu_is_omap34xx()) { |
| /* |
| * SRAM must be marked as non-cached on OMAP3 since the |
| * CORE DPLL M2 divider change code (in SRAM) runs with the |
| * SDRAM controller disabled, and if it is marked cached, |
| * the ARM may attempt to write cache lines back to SDRAM |
| * which will cause the system to hang. |
| */ |
| cached = 0; |
| } |
| |
| omap_sram_start = ROUND_DOWN(omap_sram_start, PAGE_SIZE); |
| omap_sram_base = __arm_ioremap_exec(omap_sram_start, omap_sram_size, |
| cached); |
| if (!omap_sram_base) { |
| pr_err("SRAM: Could not map\n"); |
| return; |
| } |
| |
| omap_sram_ceil = omap_sram_base + omap_sram_size; |
| |
| /* |
| * Looks like we need to preserve some bootloader code at the |
| * beginning of SRAM for jumping to flash for reboot to work... |
| */ |
| memset((void *)omap_sram_base + SRAM_BOOTLOADER_SZ, 0, |
| omap_sram_size - SRAM_BOOTLOADER_SZ); |
| } |
| |
| /* |
| * Memory allocator for SRAM: calculates the new ceiling address |
| * for pushing a function using the fncpy API. |
| * |
| * Note that fncpy requires the returned address to be aligned |
| * to an 8-byte boundary. |
| */ |
| void *omap_sram_push_address(unsigned long size) |
| { |
| unsigned long available, new_ceil = (unsigned long)omap_sram_ceil; |
| |
| available = omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ); |
| |
| if (size > available) { |
| pr_err("Not enough space in SRAM\n"); |
| return NULL; |
| } |
| |
| new_ceil -= size; |
| new_ceil = ROUND_DOWN(new_ceil, FNCPY_ALIGN); |
| omap_sram_ceil = IOMEM(new_ceil); |
| |
| return (void *)omap_sram_ceil; |
| } |
| |
| #ifdef CONFIG_ARCH_OMAP1 |
| |
| 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); |
| } |
| |
| static int __init omap1_sram_init(void) |
| { |
| _omap_sram_reprogram_clock = |
| omap_sram_push(omap1_sram_reprogram_clock, |
| omap1_sram_reprogram_clock_sz); |
| |
| return 0; |
| } |
| |
| #else |
| #define omap1_sram_init() do {} while (0) |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP2) |
| |
| static void (*_omap2_sram_ddr_init)(u32 *slow_dll_ctrl, u32 fast_dll_ctrl, |
| u32 base_cs, u32 force_unlock); |
| |
| void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl, |
| u32 base_cs, u32 force_unlock) |
| { |
| BUG_ON(!_omap2_sram_ddr_init); |
| _omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl, |
| base_cs, force_unlock); |
| } |
| |
| static void (*_omap2_sram_reprogram_sdrc)(u32 perf_level, u32 dll_val, |
| u32 mem_type); |
| |
| void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, u32 mem_type) |
| { |
| BUG_ON(!_omap2_sram_reprogram_sdrc); |
| _omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type); |
| } |
| |
| static u32 (*_omap2_set_prcm)(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass); |
| |
| u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass) |
| { |
| BUG_ON(!_omap2_set_prcm); |
| return _omap2_set_prcm(dpll_ctrl_val, sdrc_rfr_val, bypass); |
| } |
| #endif |
| |
| #ifdef CONFIG_SOC_OMAP2420 |
| static int __init omap242x_sram_init(void) |
| { |
| _omap2_sram_ddr_init = omap_sram_push(omap242x_sram_ddr_init, |
| omap242x_sram_ddr_init_sz); |
| |
| _omap2_sram_reprogram_sdrc = omap_sram_push(omap242x_sram_reprogram_sdrc, |
| omap242x_sram_reprogram_sdrc_sz); |
| |
| _omap2_set_prcm = omap_sram_push(omap242x_sram_set_prcm, |
| omap242x_sram_set_prcm_sz); |
| |
| return 0; |
| } |
| #else |
| static inline int omap242x_sram_init(void) |
| { |
| return 0; |
| } |
| #endif |
| |
| #ifdef CONFIG_SOC_OMAP2430 |
| static int __init omap243x_sram_init(void) |
| { |
| _omap2_sram_ddr_init = omap_sram_push(omap243x_sram_ddr_init, |
| omap243x_sram_ddr_init_sz); |
| |
| _omap2_sram_reprogram_sdrc = omap_sram_push(omap243x_sram_reprogram_sdrc, |
| omap243x_sram_reprogram_sdrc_sz); |
| |
| _omap2_set_prcm = omap_sram_push(omap243x_sram_set_prcm, |
| omap243x_sram_set_prcm_sz); |
| |
| return 0; |
| } |
| #else |
| static inline int omap243x_sram_init(void) |
| { |
| return 0; |
| } |
| #endif |
| |
| #ifdef CONFIG_ARCH_OMAP3 |
| |
| static u32 (*_omap3_sram_configure_core_dpll)( |
| u32 m2, u32 unlock_dll, u32 f, u32 inc, |
| u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0, |
| u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0, |
| u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1, |
| u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1); |
| |
| u32 omap3_configure_core_dpll(u32 m2, u32 unlock_dll, u32 f, u32 inc, |
| u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0, |
| u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0, |
| u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1, |
| u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1) |
| { |
| BUG_ON(!_omap3_sram_configure_core_dpll); |
| return _omap3_sram_configure_core_dpll( |
| m2, unlock_dll, f, inc, |
| sdrc_rfr_ctrl_0, sdrc_actim_ctrl_a_0, |
| sdrc_actim_ctrl_b_0, sdrc_mr_0, |
| sdrc_rfr_ctrl_1, sdrc_actim_ctrl_a_1, |
| sdrc_actim_ctrl_b_1, sdrc_mr_1); |
| } |
| |
| #ifdef CONFIG_PM |
| void omap3_sram_restore_context(void) |
| { |
| omap_sram_ceil = omap_sram_base + omap_sram_size; |
| |
| _omap3_sram_configure_core_dpll = |
| omap_sram_push(omap3_sram_configure_core_dpll, |
| omap3_sram_configure_core_dpll_sz); |
| omap_push_sram_idle(); |
| } |
| #endif /* CONFIG_PM */ |
| |
| #endif /* CONFIG_ARCH_OMAP3 */ |
| |
| static inline int omap34xx_sram_init(void) |
| { |
| #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) |
| omap3_sram_restore_context(); |
| #endif |
| return 0; |
| } |
| |
| int __init omap_sram_init(void) |
| { |
| omap_detect_sram(); |
| omap_map_sram(); |
| |
| if (!(cpu_class_is_omap2())) |
| omap1_sram_init(); |
| else if (cpu_is_omap242x()) |
| omap242x_sram_init(); |
| else if (cpu_is_omap2430()) |
| omap243x_sram_init(); |
| else if (cpu_is_omap34xx()) |
| omap34xx_sram_init(); |
| |
| return 0; |
| } |