@@ -356,7 +356,7 @@ static int __init omap1_init_devices(void)
if (!cpu_class_is_omap1())
return -ENODEV;
- omap_sram_init();
+ omap1_sram_init();
omap1_clk_late_init();
/* please keep these calls, and their implementations above,
@@ -14,6 +14,7 @@
#include <asm/fncpy.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
+#include <asm/set_memory.h>
#include <asm/mach/map.h>
@@ -22,18 +23,77 @@
#define OMAP1_SRAM_PA 0x20000000
#define SRAM_BOOTLOADER_SZ 0x80
+#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
+
+static void __iomem *omap_sram_base;
+static unsigned long omap_sram_start;
+static unsigned long omap_sram_skip;
+static unsigned long omap_sram_size;
+static void __iomem *omap_sram_ceil;
+
+/*
+ * 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.
+ */
+static 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 + omap_sram_skip);
+
+ 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;
+}
+
+void *omap_sram_push(void *funcp, unsigned long size)
+{
+ void *sram;
+ unsigned long base;
+ int pages;
+ void *dst = NULL;
+
+ sram = omap_sram_push_address(size);
+ if (!sram)
+ return NULL;
+
+ base = (unsigned long)sram & PAGE_MASK;
+ pages = PAGE_ALIGN(size) / PAGE_SIZE;
+
+ set_memory_rw(base, pages);
+
+ dst = fncpy(sram, funcp, size);
+
+ set_memory_ro(base, pages);
+ set_memory_x(base, pages);
+
+ return dst;
+}
/*
* 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.
+ * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early.
*/
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;
+ unsigned long base;
+ int pages;
+
+ omap_sram_skip = SRAM_BOOTLOADER_SZ;
+ omap_sram_start = OMAP1_SRAM_PA;
if (cpu_is_omap7xx())
omap_sram_size = 0x32000; /* 200K */
@@ -47,8 +107,27 @@ static void __init omap_detect_and_map_sram(void)
omap_sram_size = 0x4000;
}
- omap_map_sram(omap_sram_start, omap_sram_size,
- omap_sram_skip, 1);
+ omap_sram_start = ROUND_DOWN(omap_sram_start, PAGE_SIZE);
+ omap_sram_base = __arm_ioremap_exec(omap_sram_start, omap_sram_size, 1);
+ 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_io(omap_sram_base + omap_sram_skip, 0,
+ omap_sram_size - omap_sram_skip);
+
+ base = (unsigned long)omap_sram_base;
+ pages = PAGE_ALIGN(omap_sram_size) / PAGE_SIZE;
+
+ set_memory_ro(base, pages);
+ set_memory_x(base, pages);
}
static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
@@ -62,7 +141,7 @@ void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
_omap_sram_reprogram_clock(dpllctl, ckctl);
}
-int __init omap_sram_init(void)
+int __init omap1_sram_init(void)
{
omap_detect_and_map_sram();
_omap_sram_reprogram_clock =
@@ -1,8 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */
-#include <plat/sram.h>
extern void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl);
+int omap1_sram_init(void);
+void *omap_sram_push(void *funcp, unsigned long size);
+
/* Do not use these */
extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
extern unsigned long omap1_sram_reprogram_clock_sz;
@@ -18,6 +18,7 @@
#include <asm/fncpy.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
+#include <asm/set_memory.h>
#include <asm/mach/map.h>
@@ -47,8 +48,68 @@
#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
static unsigned long omap_sram_start;
-static unsigned long omap_sram_skip;
static unsigned long omap_sram_size;
+static void __iomem *omap_sram_base;
+static unsigned long omap_sram_skip;
+static void __iomem *omap_sram_ceil;
+
+/*
+ * 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.
+ */
+static 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 + omap_sram_skip);
+
+ 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;
+}
+
+void *omap_sram_push(void *funcp, unsigned long size)
+{
+ void *sram;
+ unsigned long base;
+ int pages;
+ void *dst = NULL;
+
+ sram = omap_sram_push_address(size);
+ if (!sram)
+ return NULL;
+
+ base = (unsigned long)sram & PAGE_MASK;
+ pages = PAGE_ALIGN(size) / PAGE_SIZE;
+
+ set_memory_rw(base, pages);
+
+ dst = fncpy(sram, funcp, size);
+
+ set_memory_ro(base, pages);
+ set_memory_x(base, pages);
+
+ return dst;
+}
+
+/*
+ * The SRAM context is lost during off-idle and stack
+ * needs to be reset.
+ */
+static void omap_sram_reset(void)
+{
+ omap_sram_ceil = omap_sram_base + omap_sram_size;
+}
/*
* Depending on the target RAMFS firewall setup, the public usable amount of
@@ -119,6 +180,8 @@ static void __init omap_detect_sram(void)
*/
static void __init omap2_map_sram(void)
{
+ unsigned long base;
+ int pages;
int cached = 1;
if (cpu_is_omap34xx()) {
@@ -132,8 +195,30 @@ static void __init omap2_map_sram(void)
cached = 0;
}
- omap_map_sram(omap_sram_start, omap_sram_size,
- omap_sram_skip, cached);
+ if (omap_sram_size == 0)
+ return;
+
+ 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_reset();
+
+ /*
+ * Looks like we need to preserve some bootloader code at the
+ * beginning of SRAM for jumping to flash for reboot to work...
+ */
+ memset_io(omap_sram_base + omap_sram_skip, 0,
+ omap_sram_size - omap_sram_skip);
+
+ base = (unsigned long)omap_sram_base;
+ pages = PAGE_ALIGN(omap_sram_size) / PAGE_SIZE;
+
+ set_memory_ro(base, pages);
+ set_memory_x(base, pages);
}
static void (*_omap2_sram_ddr_init)(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
@@ -4,7 +4,6 @@
*/
#ifndef __ASSEMBLY__
-#include <plat/sram.h>
extern void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
u32 base_cs, u32 force_unlock);
@@ -14,6 +13,10 @@ extern u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass);
extern void omap3_sram_restore_context(void);
+extern int __init omap_sram_init(void);
+
+extern void *omap_sram_push(void *funcp, unsigned long size);
+
/* Do not use these */
extern void omap24xx_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
extern unsigned long omap24xx_sram_reprogram_clock_sz;
@@ -6,4 +6,4 @@
ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-omap/include
# Common support
-obj-y := sram.o
+obj-y :=
deleted file mode 100644
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-int omap_sram_init(void);
-
-void omap_map_sram(unsigned long start, unsigned long size,
- unsigned long skip, int cached);
-void omap_sram_reset(void);
-
-extern void *omap_sram_push(void *funcp, unsigned long size);
deleted file mode 100644
@@ -1,129 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * 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) 2009-2012 Texas Instruments
- * Added OMAP4/5 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
- */
-#undef DEBUG
-
-#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/set_memory.h>
-
-#include <asm/mach/map.h>
-
-#include <plat/sram.h>
-
-#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
-
-static void __iomem *omap_sram_base;
-static unsigned long omap_sram_skip;
-static unsigned long omap_sram_size;
-static void __iomem *omap_sram_ceil;
-
-/*
- * 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.
- */
-static 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 + omap_sram_skip);
-
- 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;
-}
-
-void *omap_sram_push(void *funcp, unsigned long size)
-{
- void *sram;
- unsigned long base;
- int pages;
- void *dst = NULL;
-
- sram = omap_sram_push_address(size);
- if (!sram)
- return NULL;
-
- base = (unsigned long)sram & PAGE_MASK;
- pages = PAGE_ALIGN(size) / PAGE_SIZE;
-
- set_memory_rw(base, pages);
-
- dst = fncpy(sram, funcp, size);
-
- set_memory_ro(base, pages);
- set_memory_x(base, pages);
-
- return dst;
-}
-
-/*
- * The SRAM context is lost during off-idle and stack
- * needs to be reset.
- */
-void omap_sram_reset(void)
-{
- omap_sram_ceil = omap_sram_base + omap_sram_size;
-}
-
-/*
- * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early.
- */
-void __init omap_map_sram(unsigned long start, unsigned long size,
- unsigned long skip, int cached)
-{
- unsigned long base;
- int pages;
-
- if (size == 0)
- return;
-
- start = ROUND_DOWN(start, PAGE_SIZE);
- omap_sram_size = size;
- omap_sram_skip = skip;
- omap_sram_base = __arm_ioremap_exec(start, size, cached);
- if (!omap_sram_base) {
- pr_err("SRAM: Could not map\n");
- return;
- }
-
- omap_sram_reset();
-
- /*
- * Looks like we need to preserve some bootloader code at the
- * beginning of SRAM for jumping to flash for reboot to work...
- */
- memset_io(omap_sram_base + omap_sram_skip, 0,
- omap_sram_size - omap_sram_skip);
-
- base = (unsigned long)omap_sram_base;
- pages = PAGE_ALIGN(omap_sram_size) / PAGE_SIZE;
-
- set_memory_ro(base, pages);
- set_memory_x(base, pages);
-}