summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/arm/include/asm/fncpy.h94
-rw-r--r--arch/arm/include/asm/module.h8
-rw-r--r--arch/arm/kernel/relocate_kernel.S12
-rw-r--r--arch/arm/mach-omap1/pm.h6
-rw-r--r--arch/arm/mach-omap1/sleep.S3
-rw-r--r--arch/arm/mach-omap1/sram.S1
-rw-r--r--arch/arm/mach-omap2/include/mach/omap4-common.h4
-rw-r--r--arch/arm/mach-omap2/omap-headsmp.S2
-rw-r--r--arch/arm/mach-omap2/omap44xx-smc.S8
-rw-r--r--arch/arm/mach-omap2/pm.h2
-rw-r--r--arch/arm/mach-omap2/sleep24xx.S2
-rw-r--r--arch/arm/mach-omap2/sleep34xx.S71
-rw-r--r--arch/arm/mach-omap2/sram242x.S3
-rw-r--r--arch/arm/mach-omap2/sram243x.S3
-rw-r--r--arch/arm/mach-omap2/sram34xx.S37
-rw-r--r--arch/arm/plat-omap/include/plat/sram.h14
-rw-r--r--arch/arm/plat-omap/sram.c14
17 files changed, 243 insertions, 41 deletions
diff --git a/arch/arm/include/asm/fncpy.h b/arch/arm/include/asm/fncpy.h
new file mode 100644
index 00000000000..de535474692
--- /dev/null
+++ b/arch/arm/include/asm/fncpy.h
@@ -0,0 +1,94 @@
+/*
+ * arch/arm/include/asm/fncpy.h - helper macros for function body copying
+ *
+ * Copyright (C) 2011 Linaro Limited
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * These macros are intended for use when there is a need to copy a low-level
+ * function body into special memory.
+ *
+ * For example, when reconfiguring the SDRAM controller, the code doing the
+ * reconfiguration may need to run from SRAM.
+ *
+ * NOTE: that the copied function body must be entirely self-contained and
+ * position-independent in order for this to work properly.
+ *
+ * NOTE: in order for embedded literals and data to get referenced correctly,
+ * the alignment of functions must be preserved when copying. To ensure this,
+ * the source and destination addresses for fncpy() must be aligned to a
+ * multiple of 8 bytes: you will be get a BUG() if this condition is not met.
+ * You will typically need a ".align 3" directive in the assembler where the
+ * function to be copied is defined, and ensure that your allocator for the
+ * destination buffer returns 8-byte-aligned pointers.
+ *
+ * Typical usage example:
+ *
+ * extern int f(args);
+ * extern uint32_t size_of_f;
+ * int (*copied_f)(args);
+ * void *sram_buffer;
+ *
+ * copied_f = fncpy(sram_buffer, &f, size_of_f);
+ *
+ * ... later, call the function: ...
+ *
+ * copied_f(args);
+ *
+ * The size of the function to be copied can't be determined from C:
+ * this must be determined by other means, such as adding assmbler directives
+ * in the file where f is defined.
+ */
+
+#ifndef __ASM_FNCPY_H
+#define __ASM_FNCPY_H
+
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/bug.h>
+#include <asm/cacheflush.h>
+
+/*
+ * Minimum alignment requirement for the source and destination addresses
+ * for function copying.
+ */
+#define FNCPY_ALIGN 8
+
+#define fncpy(dest_buf, funcp, size) ({ \
+ uintptr_t __funcp_address; \
+ typeof(funcp) __result; \
+ \
+ asm("" : "=r" (__funcp_address) : "0" (funcp)); \
+ \
+ /* \
+ * Ensure alignment of source and destination addresses, \
+ * disregarding the function's Thumb bit: \
+ */ \
+ BUG_ON((uintptr_t)(dest_buf) & (FNCPY_ALIGN - 1) || \
+ (__funcp_address & ~(uintptr_t)1 & (FNCPY_ALIGN - 1))); \
+ \
+ memcpy(dest_buf, (void const *)(__funcp_address & ~1), size); \
+ flush_icache_range((unsigned long)(dest_buf), \
+ (unsigned long)(dest_buf) + (size)); \
+ \
+ asm("" : "=r" (__result) \
+ : "0" ((uintptr_t)(dest_buf) | (__funcp_address & 1))); \
+ \
+ __result; \
+})
+
+#endif /* !__ASM_FNCPY_H */
diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index a2b775b81cf..543b44916d2 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -40,8 +40,16 @@ struct mod_arch_specific {
#define MODULE_ARCH_VERMAGIC_P2V ""
#endif
+/* Add instruction set architecture tag to distinguish ARM/Thumb kernels */
+#ifdef CONFIG_THUMB2_KERNEL
+#define MODULE_ARCH_VERMAGIC_ARMTHUMB "thumb2 "
+#else
+#define MODULE_ARCH_VERMAGIC_ARMTHUMB ""
+#endif
+
#define MODULE_ARCH_VERMAGIC \
MODULE_ARCH_VERMAGIC_ARMVSN \
+ MODULE_ARCH_VERMAGIC_ARMTHUMB \
MODULE_ARCH_VERMAGIC_P2V
#endif /* _ASM_ARM_MODULE_H */
diff --git a/arch/arm/kernel/relocate_kernel.S b/arch/arm/kernel/relocate_kernel.S
index 9cf4cbf8f95..a2599e7e151 100644
--- a/arch/arm/kernel/relocate_kernel.S
+++ b/arch/arm/kernel/relocate_kernel.S
@@ -7,8 +7,8 @@
.globl relocate_new_kernel
relocate_new_kernel:
- ldr r0,kexec_indirection_page
- ldr r1,kexec_start_address
+ ldr r0,__kexec_indirection_page
+ ldr r1,__kexec_start_address
/*
* If there is no indirection page (we are doing crashdumps)
@@ -55,27 +55,31 @@ relocate_new_kernel:
/* Jump to relocated kernel */
mov lr,r1
mov r0,#0
- ldr r1,kexec_mach_type
- ldr r2,kexec_boot_atags
+ ldr r1,__kexec_mach_type
+ ldr r2,__kexec_boot_atags
mov pc,lr
.align
.globl kexec_start_address
kexec_start_address:
+__kexec_start_address:
.long 0x0
.globl kexec_indirection_page
kexec_indirection_page:
+__kexec_indirection_page:
.long 0x0
.globl kexec_mach_type
kexec_mach_type:
+__kexec_mach_type:
.long 0x0
/* phy addr of the atags for the new kernel */
.globl kexec_boot_atags
kexec_boot_atags:
+__kexec_boot_atags:
.long 0x0
relocate_new_kernel_end:
diff --git a/arch/arm/mach-omap1/pm.h b/arch/arm/mach-omap1/pm.h
index 56a647986ae..cd926dcb5e7 100644
--- a/arch/arm/mach-omap1/pm.h
+++ b/arch/arm/mach-omap1/pm.h
@@ -123,9 +123,9 @@ extern void allow_idle_sleep(void);
extern void omap1_pm_idle(void);
extern void omap1_pm_suspend(void);
-extern void omap7xx_cpu_suspend(unsigned short, unsigned short);
-extern void omap1510_cpu_suspend(unsigned short, unsigned short);
-extern void omap1610_cpu_suspend(unsigned short, unsigned short);
+extern void omap7xx_cpu_suspend(unsigned long, unsigned long);
+extern void omap1510_cpu_suspend(unsigned long, unsigned long);
+extern void omap1610_cpu_suspend(unsigned long, unsigned long);
extern void omap7xx_idle_loop_suspend(void);
extern void omap1510_idle_loop_suspend(void);
extern void omap1610_idle_loop_suspend(void);
diff --git a/arch/arm/mach-omap1/sleep.S b/arch/arm/mach-omap1/sleep.S
index ef771ce8b03..c875bdc902c 100644
--- a/arch/arm/mach-omap1/sleep.S
+++ b/arch/arm/mach-omap1/sleep.S
@@ -58,6 +58,7 @@
*/
#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
+ .align 3
ENTRY(omap7xx_cpu_suspend)
@ save registers on stack
@@ -137,6 +138,7 @@ ENTRY(omap7xx_cpu_suspend_sz)
#endif /* CONFIG_ARCH_OMAP730 || CONFIG_ARCH_OMAP850 */
#ifdef CONFIG_ARCH_OMAP15XX
+ .align 3
ENTRY(omap1510_cpu_suspend)
@ save registers on stack
@@ -211,6 +213,7 @@ ENTRY(omap1510_cpu_suspend_sz)
#endif /* CONFIG_ARCH_OMAP15XX */
#if defined(CONFIG_ARCH_OMAP16XX)
+ .align 3
ENTRY(omap1610_cpu_suspend)
@ save registers on stack
diff --git a/arch/arm/mach-omap1/sram.S b/arch/arm/mach-omap1/sram.S
index 7724e520d07..692587d07ea 100644
--- a/arch/arm/mach-omap1/sram.S
+++ b/arch/arm/mach-omap1/sram.S
@@ -18,6 +18,7 @@
/*
* Reprograms ULPD and CKCTL.
*/
+ .align 3
ENTRY(omap1_sram_reprogram_clock)
stmfd sp!, {r0 - r12, lr} @ save registers on stack
diff --git a/arch/arm/mach-omap2/include/mach/omap4-common.h b/arch/arm/mach-omap2/include/mach/omap4-common.h
index 5b0270b2893..de441c05a6a 100644
--- a/arch/arm/mach-omap2/include/mach/omap4-common.h
+++ b/arch/arm/mach-omap2/include/mach/omap4-common.h
@@ -17,8 +17,12 @@
* wfi used in low power code. Directly opcode is used instead
* of instruction to avoid mulit-omap build break
*/
+#ifdef CONFIG_THUMB2_KERNEL
+#define do_wfi() __asm__ __volatile__ ("wfi" : : : "memory")
+#else
#define do_wfi() \
__asm__ __volatile__ (".word 0xe320f003" : : : "memory")
+#endif
#ifdef CONFIG_CACHE_L2X0
extern void __iomem *l2cache_base;
diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
index 6ae937a06cc..4ee6aeca885 100644
--- a/arch/arm/mach-omap2/omap-headsmp.S
+++ b/arch/arm/mach-omap2/omap-headsmp.S
@@ -45,5 +45,5 @@ hold: ldr r12,=0x103
* should now contain the SVC stack for this core
*/
b secondary_startup
-END(omap_secondary_startup)
+ENDPROC(omap_secondary_startup)
diff --git a/arch/arm/mach-omap2/omap44xx-smc.S b/arch/arm/mach-omap2/omap44xx-smc.S
index 1980dc31a1a..e69d37d9520 100644
--- a/arch/arm/mach-omap2/omap44xx-smc.S
+++ b/arch/arm/mach-omap2/omap44xx-smc.S
@@ -29,7 +29,7 @@ ENTRY(omap_smc1)
dsb
smc #0
ldmfd sp!, {r2-r12, pc}
-END(omap_smc1)
+ENDPROC(omap_smc1)
ENTRY(omap_modify_auxcoreboot0)
stmfd sp!, {r1-r12, lr}
@@ -37,7 +37,7 @@ ENTRY(omap_modify_auxcoreboot0)
dsb
smc #0
ldmfd sp!, {r1-r12, pc}
-END(omap_modify_auxcoreboot0)
+ENDPROC(omap_modify_auxcoreboot0)
ENTRY(omap_auxcoreboot_addr)
stmfd sp!, {r2-r12, lr}
@@ -45,7 +45,7 @@ ENTRY(omap_auxcoreboot_addr)
dsb
smc #0
ldmfd sp!, {r2-r12, pc}
-END(omap_auxcoreboot_addr)
+ENDPROC(omap_auxcoreboot_addr)
ENTRY(omap_read_auxcoreboot0)
stmfd sp!, {r2-r12, lr}
@@ -54,4 +54,4 @@ ENTRY(omap_read_auxcoreboot0)
smc #0
mov r0, r0, lsr #9
ldmfd sp!, {r2-r12, pc}
-END(omap_read_auxcoreboot0)
+ENDPROC(omap_read_auxcoreboot0)
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index f4a5f716422..797bfd12b64 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -92,7 +92,7 @@ extern void omap24xx_idle_loop_suspend(void);
extern void omap24xx_cpu_suspend(u32 dll_ctrl, void __iomem *sdrc_dlla_ctrl,
void __iomem *sdrc_power);
extern void omap34xx_cpu_suspend(u32 *addr, int save_state);
-extern void save_secure_ram_context(u32 *addr);
+extern int save_secure_ram_context(u32 *addr);
extern void omap3_save_scratchpad_contents(void);
extern unsigned int omap24xx_idle_loop_suspend_sz;
diff --git a/arch/arm/mach-omap2/sleep24xx.S b/arch/arm/mach-omap2/sleep24xx.S
index c7780cc8d91..b5071a47ec3 100644
--- a/arch/arm/mach-omap2/sleep24xx.S
+++ b/arch/arm/mach-omap2/sleep24xx.S
@@ -47,6 +47,7 @@
* Note: This code get's copied to internal SRAM at boot. When the OMAP
* wakes up it continues execution at the point it went to sleep.
*/
+ .align 3
ENTRY(omap24xx_idle_loop_suspend)
stmfd sp!, {r0, lr} @ save registers on stack
mov r0, #0 @ clear for mcr setup
@@ -82,6 +83,7 @@ ENTRY(omap24xx_idle_loop_suspend_sz)
* The DLL load value is not kept in RETENTION or OFF. It needs to be restored
* at wake
*/
+ .align 3
ENTRY(omap24xx_cpu_suspend)
stmfd sp!, {r0 - r12, lr} @ save registers on stack
mov r3, #0x0 @ clear for mcr call
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S
index 98d8232808b..6147088e6bc 100644
--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -64,6 +64,11 @@
#define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS)
#define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
+/*
+ * This file needs be built unconditionally as ARM to interoperate correctly
+ * with non-Thumb-2-capable firmware.
+ */
+ .arm
/*
* API functions
@@ -82,6 +87,8 @@ ENTRY(get_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore
ldmfd sp!, {pc} @ restore regs and return
+ENDPROC(get_restore_pointer)
+ .align
ENTRY(get_restore_pointer_sz)
.word . - get_restore_pointer
@@ -91,6 +98,8 @@ ENTRY(get_omap3630_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore_3630
ldmfd sp!, {pc} @ restore regs and return
+ENDPROC(get_omap3630_restore_pointer)
+ .align
ENTRY(get_omap3630_restore_pointer_sz)
.word . - get_omap3630_restore_pointer
@@ -100,6 +109,8 @@ ENTRY(get_es3_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore_es3
ldmfd sp!, {pc} @ restore regs and return
+ENDPROC(get_es3_restore_pointer)
+ .align
ENTRY(get_es3_restore_pointer_sz)
.word . - get_es3_restore_pointer
@@ -113,11 +124,14 @@ ENTRY(enable_omap3630_toggle_l2_on_restore)
stmfd sp!, {lr} @ save registers on stack
/* Setup so that we will disable and enable l2 */
mov r1, #0x1
- str r1, l2dis_3630
+ adrl r2, l2dis_3630 @ may be too distant for plain adr
+ str r1, [r2]
ldmfd sp!, {pc} @ restore regs and return
+ENDPROC(enable_omap3630_toggle_l2_on_restore)
.text
/* Function to call rom code to save secure ram context */
+ .align 3
ENTRY(save_secure_ram_context)
stmfd sp!, {r1-r12, lr} @ save registers on stack
adr r3, api_params @ r3 points to parameters
@@ -133,18 +147,20 @@ ENTRY(save_secure_ram_context)
mov r6, #0xff
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
- .word 0xE1600071 @ call SMI monitor (smi #1)
+ smc #1 @ call SMI monitor (smi #1)
nop
nop
nop
nop
ldmfd sp!, {r1-r12, pc}
+ .align
sram_phy_addr_mask:
.word SRAM_BASE_P
high_mask:
.word 0xffff
api_params:
.word 0x4, 0x0, 0x0, 0x1, 0x1
+ENDPROC(save_secure_ram_context)
ENTRY(save_secure_ram_context_sz)
.word . - save_secure_ram_context
@@ -169,6 +185,7 @@ ENTRY(save_secure_ram_context_sz)
* depending on the low power mode (non-OFF vs OFF modes),
* cf. 'Resume path for xxx mode' comments.
*/
+ .align 3
ENTRY(omap34xx_cpu_suspend)
stmfd sp!, {r0-r12, lr} @ save registers on stack
@@ -279,8 +296,18 @@ clean_l2:
* - 'might' have to copy address, load and jump to it
*/
ldr r1, kernel_flush
- mov lr, pc
- bx r1
+ blx r1
+ /*
+ * The kernel doesn't interwork: v7_flush_dcache_all in particluar will
+ * always return in Thumb state when CONFIG_THUMB2_KERNEL is enabled.
+ * This sequence switches back to ARM. Note that .align may insert a
+ * nop: bx pc needs to be word-aligned in order to work.
+ */
+ THUMB( .thumb )
+ THUMB( .align )
+ THUMB( bx pc )
+ THUMB( nop )
+ .arm
omap3_do_wfi:
ldr r4, sdrc_power @ read the SDRC_POWER register
@@ -346,9 +373,9 @@ restore_es3:
and r4, r4, #0x3
cmp r4, #0x0 @ Check if previous power state of CORE is OFF
bne restore
- adr r0, es3_sdrc_fix
+ adr r0, _es3_sdrc_fix
ldr r1, sram_base
- ldr r2, es3_sdrc_fix_sz
+ ldr r2, _es3_sdrc_fix_sz
mov r2, r2, ror #2
copy_to_sram:
ldmia r0!, {r3} @ val = *src
@@ -408,7 +435,7 @@ skipl2dis:
adr r3, l2_inv_api_params @ r3 points to dummy parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
- .word 0xE1600071 @ call SMI monitor (smi #1)
+ smc #1 @ call SMI monitor (smi #1)
/* Write to Aux control register to set some bits */
mov r0, #42 @ set service ID for PPA
mov r12, r0 @ copy secure Service ID in r12
@@ -419,7 +446,7 @@ skipl2dis:
ldr r3, [r4, #0xBC] @ r3 points to parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
- .word 0xE1600071 @ call SMI monitor (smi #1)
+ smc #1 @ call SMI monitor (smi #1)
#ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE
/* Restore L2 aux control register */
@@ -434,27 +461,28 @@ skipl2dis:
adds r3, r3, #8 @ r3 points to parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
- .word 0xE1600071 @ call SMI monitor (smi #1)
+ smc #1 @ call SMI monitor (smi #1)
#endif
b logic_l1_restore
+ .align
l2_inv_api_params:
.word 0x1, 0x00
l2_inv_gp:
/* Execute smi to invalidate L2 cache */
mov r12, #0x1 @ set up to invalidate L2
- .word 0xE1600070 @ Call SMI monitor (smieq)
+ smc #0 @ Call SMI monitor (smieq)
/* Write to Aux control register to set some bits */
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
ldr r0, [r3,#4]
mov r12, #0x3
- .word 0xE1600070 @ Call SMI monitor (smieq)
+ smc #0 @ Call SMI monitor (smieq)
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
ldr r0, [r3,#12]
mov r12, #0x2
- .word 0xE1600070 @ Call SMI monitor (smieq)
+ smc #0 @ Call SMI monitor (smieq)
logic_l1_restore:
ldr r1, l2dis_3630
cmp r1, #0x1 @ Test if L2 re-enable needed on 3630
@@ -607,6 +635,9 @@ usettbr0:
/* This function implements the erratum ID i443 WA, applies to 34xx >= ES3.0 */
.text
+ .align 3
+.type _es3_sdrc_fix, %function
+_es3_sdrc_fix:
ENTRY(es3_sdrc_fix)
ldr r4, sdrc_syscfg @ get config addr
ldr r5, [r4] @ get value
@@ -634,6 +665,7 @@ ENTRY(es3_sdrc_fix)
str r5, [r4] @ kick off refreshes
bx lr
+ .align
sdrc_syscfg:
.word SDRC_SYSCONFIG_P
sdrc_mr_0:
@@ -648,6 +680,8 @@ sdrc_emr2_1:
.word SDRC_EMR2_1_P
sdrc_manual_1:
.word SDRC_MANUAL_1_P
+ENDPROC(es3_sdrc_fix)
+_es3_sdrc_fix_sz:
ENTRY(es3_sdrc_fix_sz)
.word . - es3_sdrc_fix
@@ -682,6 +716,12 @@ wait_sdrc_ready:
bic r5, r5, #0x40
str r5, [r4]
+/*
+ * PC-relative stores lead to undefined behaviour in Thumb-2: use a r7 as a
+ * base instead.
+ * Be careful not to clobber r7 when maintaining this code.
+ */
+
is_dll_in_lock_mode:
/* Is dll in lock mode? */
ldr r4, sdrc_dlla_ctrl
@@ -689,10 +729,11 @@ is_dll_in_lock_mode:
tst r5, #0x4
bxne lr @ Return if locked
/* wait till dll locks */
+ adr r7, kick_counter
wait_dll_lock_timed:
ldr r4, wait_dll_lock_counter
add r4, r4, #1
- str r4, wait_dll_lock_counter
+ str r4, [r7, #wait_dll_lock_counter - kick_counter]
ldr r4, sdrc_dlla_status
/* Wait 20uS for lock */
mov r6, #8
@@ -718,9 +759,10 @@ kick_dll:
dsb
ldr r4, kick_counter
add r4, r4, #1
- str r4, kick_counter
+ str r4, [r7] @ kick_counter
b wait_dll_lock_timed
+ .align
cm_idlest1_core:
.word CM_IDLEST1_CORE_V
cm_idlest_ckgen:
@@ -763,6 +805,7 @@ kick_counter:
.word 0
wait_dll_lock_counter:
.word 0
+ENDPROC(omap34xx_cpu_suspend)
ENTRY(omap34xx_cpu_suspend_sz)
.word . - omap34xx_cpu_suspend
diff --git a/arch/arm/mach-omap2/sram242x.S b/arch/arm/mach-omap2/sram242x.S
index 055310cc77d..ff9b9dbcb30 100644
--- a/arch/arm/mach-omap2/sram242x.S
+++ b/arch/arm/mach-omap2/sram242x.S
@@ -39,6 +39,7 @@
.text
+ .align 3
ENTRY(omap242x_sram_ddr_init)
stmfd sp!, {r0 - r12, lr} @ save registers on stack
@@ -143,6 +144,7 @@ ENTRY(omap242x_sram_ddr_init_sz)
* r0 = [PRCM_FULL | PRCM_HALF] r1 = SDRC_DLLA_CTRL value r2 = [DDR | SDR]
* PRCM_FULL = 2, PRCM_HALF = 1, DDR = 1, SDR = 0
*/
+ .align 3
ENTRY(omap242x_sram_reprogram_sdrc)
stmfd sp!, {r0 - r10, lr} @ save registers on stack
mov r3, #0x0 @ clear for mrc call
@@ -238,6 +240,7 @@ ENTRY(omap242x_sram_reprogram_sdrc_sz)
/*
* Set dividers and pll. Also recalculate DLL value for DDR and unlock mode.
*/
+ .align 3
ENTRY(omap242x_sram_set_prcm)
stmfd sp!, {r0-r12, lr} @ regs to stack
adr r4, pbegin @ addr of preload start
diff --git a/arch/arm/mach-omap2/sram243x.S b/arch/arm/mach-omap2/sram243x.S
index f9007580aea..76730209fa0 100644
--- a/arch/arm/mach-omap2/sram243x.S
+++ b/arch/arm/mach-omap2/sram243x.S
@@ -39,6 +39,7 @@
.text
+ .align 3
ENTRY(omap243x_sram_ddr_init)
stmfd sp!, {r0 - r12, lr} @ save registers on stack
@@ -143,6 +144,7 @@ ENTRY(omap243x_sram_ddr_init_sz)
* r0 = [PRCM_FULL | PRCM_HALF] r1 = SDRC_DLLA_CTRL value r2 = [DDR | SDR]
* PRCM_FULL = 2, PRCM_HALF = 1, DDR = 1, SDR = 0
*/
+ .align 3
ENTRY(omap243x_sram_reprogram_sdrc)
stmfd sp!, {r0 - r10, lr} @ save registers on stack
mov r3, #0x0 @ clear for mrc call
@@ -238,6 +240,7 @@ ENTRY(omap243x_sram_reprogram_sdrc_sz)
/*
* Set dividers and pll. Also recalculate DLL value for DDR and unlock mode.
*/
+ .align 3
ENTRY(omap243x_sram_set_prcm)
stmfd sp!, {r0-r12, lr} @ regs to stack
adr r4, pbegin @ addr of preload start
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S
index 7f893a29d50..13a8eba81d6 100644
--- a/arch/arm/mach-omap2/sram34xx.S
+++ b/arch/arm/mach-omap2/sram34xx.S
@@ -34,6 +34,12 @@
#include "sdrc.h"
#include "cm2xxx_3xxx.h"
+/*
+ * This file needs be built unconditionally as ARM to interoperate correctly
+ * with non-Thumb-2-capable firmware.
+ */
+ .arm
+
.text
/* r1 parameters */
@@ -111,29 +117,42 @@
* since it will cause the ARM MMU to attempt to walk the page tables.
* These crashes may be intermittent.
*/
+ .align 3
ENTRY(omap3_sram_configure_core_dpll)
stmfd sp!, {r1-r12, lr} @ store regs to stack
@ pull the extra args off the stack
@ and store them in SRAM
+
+/*
+ * PC-relative stores are deprecated in ARMv7 and lead to undefined behaviour
+ * in Thumb-2: use a r7 as a base instead.
+ * Be careful not to clobber r7 when maintaing this file.
+ */
+ THUMB( adr r7, omap3_sram_configure_core_dpll )
+ .macro strtext Rt:req, label:req
+ ARM( str \Rt, \label )
+ THUMB( str \Rt, [r7, \label - omap3_sram_configure_core_dpll] )
+ .endm
+
ldr r4, [sp, #52]
- str r4, omap_sdrc_rfr_ctrl_0_val
+ strtext r4, omap_sdrc_rfr_ctrl_0_val
ldr r4, [sp, #56]
- str r4, omap_sdrc_actim_ctrl_a_0_val
+ strtext r4, omap_sdrc_actim_ctrl_a_0_val
ldr r4, [sp, #60]
- str r4, omap_sdrc_actim_ctrl_b_0_val
+ strtext r4, omap_sdrc_actim_ctrl_b_0_val
ldr r4, [sp, #64]
- str r4, omap_sdrc_mr_0_val
+ strtext r4, omap_sdrc_mr_0_val
ldr r4, [sp, #68]
- str r4, omap_sdrc_rfr_ctrl_1_val
+ strtext r4, omap_sdrc_rfr_ctrl_1_val
cmp r4, #0 @ if SDRC_RFR_CTRL_1 is 0,
beq skip_cs1_params @ do not use cs1 params
ldr r4, [sp, #72]
- str r4, omap_sdrc_actim_ctrl_a_1_val
+ strtext r4, omap_sdrc_actim_ctrl_a_1_val
ldr r4, [sp, #76]
- str r4, omap_sdrc_actim_ctrl_b_1_val
+ strtext r4, omap_sdrc_actim_ctrl_b_1_val
ldr r4, [sp, #80]
- str r4, omap_sdrc_mr_1_val
+ strtext r4, omap_sdrc_mr_1_val
skip_cs1_params:
mrc p15, 0, r8, c1, c0, 0 @ read ctrl register
bic r10, r8, #0x800 @ clear Z-bit, disable branch prediction
@@ -271,6 +290,7 @@ skip_cs1_prog:
ldr r12, [r11] @ posted-write barrier for SDRC
bx lr
+ .align
omap3_sdrc_power:
.word OMAP34XX_SDRC_REGADDR(SDRC_POWER)
omap3_cm_clksel1_pll:
@@ -319,6 +339,7 @@ omap3_sdrc_dlla_ctrl:
.word OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
core_m2_mask_val:
.word 0x07FFFFFF
+ENDPROC(omap3_sram_configure_core_dpll)
ENTRY(omap3_sram_configure_core_dpll_sz)
.word . - omap3_sram_configure_core_dpll
diff --git a/arch/arm/plat-omap/include/plat/sram.h b/arch/arm/plat-omap/include/plat/sram.h
index 9967d5e855c..f500fc34d06 100644
--- a/arch/arm/plat-omap/include/plat/sram.h
+++ b/arch/arm/plat-omap/include/plat/sram.h
@@ -12,7 +12,19 @@
#define __ARCH_ARM_OMAP_SRAM_H
#ifndef __ASSEMBLY__
-extern void * omap_sram_push(void * start, unsigned long size);
+#include <asm/fncpy.h>
+
+extern void *omap_sram_push_address(unsigned long size);
+
+/* Macro to push a function to the internal SRAM, using the fncpy API */
+#define omap_sram_push(funcp, size) ({ \
+ typeof(&(funcp)) _res = NULL; \
+ void *_sram_address = omap_sram_push_address(size); \
+ if (_sram_address) \
+ _res = fncpy(_sram_address, &(funcp), size); \
+ _res; \
+})
+
extern void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl);
extern void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index e26e50487d6..68fcc7dc56e 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -242,7 +242,14 @@ static void __init omap_map_sram(void)
omap_sram_size - SRAM_BOOTLOADER_SZ);
}
-void * omap_sram_push(void * start, unsigned long size)
+/*
+ * 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)
{
if (size > (omap_sram_ceil - (omap_sram_base + SRAM_BOOTLOADER_SZ))) {
printk(KERN_ERR "Not enough space in SRAM\n");
@@ -250,10 +257,7 @@ void * omap_sram_push(void * start, unsigned long size)
}
omap_sram_ceil -= size;
- omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *));
- memcpy((void *)omap_sram_ceil, start, size);
- flush_icache_range((unsigned long)omap_sram_ceil,
- (unsigned long)(omap_sram_ceil + size));
+ omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, FNCPY_ALIGN);
return (void *)omap_sram_ceil;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 13:31:15 +0000