1 files changed, 41 insertions, 25 deletions

diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index fa5297d643d3..a5b9bcd6b108 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -6,6 +6,9 @@
  * 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.
@@ -38,12 +41,14 @@
 #define OMAP1_SRAM_VA           VMALLOC_END
 #define OMAP2_SRAM_PA           0x40200000
 #define OMAP2_SRAM_PUB_PA       0x4020f800
-#define OMAP2_SRAM_VA           VMALLOC_END
-#define OMAP2_SRAM_PUB_VA       (VMALLOC_END + 0x800)
+#define OMAP2_SRAM_VA           0xe3000000
+#define OMAP2_SRAM_PUB_VA       (OMAP2_SRAM_VA + 0x800)
 #define OMAP3_SRAM_PA           0x40200000
 #define OMAP3_SRAM_VA           0xd7000000
 #define OMAP3_SRAM_PUB_PA       0x40208000
 #define OMAP3_SRAM_PUB_VA       0xd7008000
+#define OMAP4_SRAM_PA           0x40200000              /*0x402f0000*/
+#define OMAP4_SRAM_VA           0xd7000000              /*0xd70f0000*/
 
 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
 #define SRAM_BOOTLOADER_SZ      0x00
@@ -87,6 +92,10 @@ static int is_sram_locked(void)
 {
         int type = 0;
 
+        if (cpu_is_omap44xx())
+                /* Not yet supported */
+                return 0;
+
         if (cpu_is_omap242x())
                 type = omap_rev() & OMAP2_DEVICETYPE_MASK;
 
@@ -135,6 +144,10 @@ void __init omap_detect_sram(void)
                                 omap_sram_base = OMAP3_SRAM_VA;
                                 omap_sram_start = OMAP3_SRAM_PA;
                                 omap_sram_size = 0x10000; /* 64K */
+                        } else if (cpu_is_omap44xx()) {
+                                omap_sram_base = OMAP4_SRAM_VA;
+                                omap_sram_start = OMAP4_SRAM_PA;
+                                omap_sram_size = 0x8000; /* 32K */
                         } else {
                                 omap_sram_base = OMAP2_SRAM_VA;
                                 omap_sram_start = OMAP2_SRAM_PA;
@@ -201,8 +214,23 @@ void __init omap_map_sram(void)
                 base = OMAP3_SRAM_PA;
                 base = ROUND_DOWN(base, PAGE_SIZE);
                 omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
+
+                /*
+                 * 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.
+                 */
+                omap_sram_io_desc[0].type = MT_MEMORY_NONCACHED;
         }
 
+        if (cpu_is_omap44xx()) {
+                omap_sram_io_desc[0].virtual = OMAP4_SRAM_VA;
+                base = OMAP4_SRAM_PA;
+                base = ROUND_DOWN(base, PAGE_SIZE);
+                omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
+        }
         omap_sram_io_desc[0].length = 1024 * 1024;      /* Use section desc */
         iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc));
 
@@ -242,20 +270,13 @@ void * omap_sram_push(void * start, unsigned long size)
         return (void *)omap_sram_ceil;
 }
 
-static void omap_sram_error(void)
-{
-        panic("Uninitialized SRAM function\n");
-}
-
 #ifdef CONFIG_ARCH_OMAP1
 
 static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
 
 void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
 {
-        if (!_omap_sram_reprogram_clock)
-                omap_sram_error();
-
+        BUG_ON(!_omap_sram_reprogram_clock);
         _omap_sram_reprogram_clock(dpllctl, ckctl);
 }
 
@@ -280,9 +301,7 @@ static void (*_omap2_sram_ddr_init)(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
 void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
                    u32 base_cs, u32 force_unlock)
 {
-        if (!_omap2_sram_ddr_init)
-                omap_sram_error();
-
+        BUG_ON(!_omap2_sram_ddr_init);
         _omap2_sram_ddr_init(slow_dll_ctrl, fast_dll_ctrl,
                              base_cs, force_unlock);
 }
@@ -292,9 +311,7 @@ static void (*_omap2_sram_reprogram_sdrc)(u32 perf_level, u32 dll_val,
 
 void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, u32 mem_type)
 {
-        if (!_omap2_sram_reprogram_sdrc)
-                omap_sram_error();
-
+        BUG_ON(!_omap2_sram_reprogram_sdrc);
         _omap2_sram_reprogram_sdrc(perf_level, dll_val, mem_type);
 }
 
@@ -302,9 +319,7 @@ 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)
 {
-        if (!_omap2_set_prcm)
-                omap_sram_error();
-
+        BUG_ON(!_omap2_set_prcm);
         return _omap2_set_prcm(dpll_ctrl_val, sdrc_rfr_val, bypass);
 }
 #endif
@@ -356,16 +371,15 @@ static inline int omap243x_sram_init(void)
 static u32 (*_omap3_sram_configure_core_dpll)(u32 sdrc_rfr_ctrl,
                                               u32 sdrc_actim_ctrla,
                                               u32 sdrc_actim_ctrlb,
-                                              u32 m2);
+                                              u32 m2, u32 unlock_dll);
 u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla,
-                              u32 sdrc_actim_ctrlb, u32 m2)
+                              u32 sdrc_actim_ctrlb, u32 m2, u32 unlock_dll)
 {
-        if (!_omap3_sram_configure_core_dpll)
-                omap_sram_error();
-
+        BUG_ON(!_omap3_sram_configure_core_dpll);
         return _omap3_sram_configure_core_dpll(sdrc_rfr_ctrl,
                                                sdrc_actim_ctrla,
-                                               sdrc_actim_ctrlb, m2);
+                                               sdrc_actim_ctrlb, m2,
+                                               unlock_dll);
 }
 
 /* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */
@@ -406,6 +420,8 @@ int __init omap_sram_init(void)
                 omap243x_sram_init();
         else if (cpu_is_omap34xx())
                 omap34xx_sram_init();
+        else if (cpu_is_omap44xx())
+                omap34xx_sram_init(); /* FIXME: */
 
         return 0;
 }