ARM: OMAP: Add Secure HAL and monitor mode API infrastructure.

On OMAP secure/emulation devices, certain APIs are exported by secure
code. Add an infrastructure so that relevant operations on secure
devices can be implemented using it.

While at this, rename omap44xx-smc.S to omap-smc.S since the common APIs
can be used on other OMAP's too.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap-smc.S b/arch/arm/mach-omap2/omap-smc.S
new file mode 100644
index 00000000000..f6441c13cd8
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-smc.S
@@ -0,0 +1,80 @@
+/*
+ * OMAP44xx secure APIs file.
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Written by 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.
+ */
+
+#include <linux/linkage.h>
+
+/*
+ * This is common routine to manage secure monitor API
+ * used to modify the PL310 secure registers.
+ * 'r0' contains the value to be modified and 'r12' contains
+ * the monitor API number. It uses few CPU registers
+ * internally and hence they need be backed up including
+ * link register "lr".
+ * Function signature : void omap_smc1(u32 fn, u32 arg)
+ */
+
+ENTRY(omap_smc1)
+        stmfd   sp!, {r2-r12, lr}
+        mov     r12, r0
+        mov     r0, r1
+        dsb
+        smc     #0
+        ldmfd   sp!, {r2-r12, pc}
+ENDPROC(omap_smc1)
+
+/**
+ * u32 omap_smc2(u32 id, u32 falg, u32 pargs)
+ * Low level common routine for secure HAL and PPA APIs.
+ * @id: Application ID of HAL APIs
+ * @flag: Flag to indicate the criticality of operation
+ * @pargs: Physical address of parameter list starting
+ *          with number of parametrs
+ */
+ENTRY(omap_smc2)
+        stmfd   sp!, {r4-r12, lr}
+        mov     r3, r2
+        mov     r2, r1
+        mov     r1, #0x0        @ Process ID
+        mov     r6, #0xff
+        mov     r12, #0x00      @ Secure Service ID
+        mov     r7, #0
+        mcr     p15, 0, r7, c7, c5, 6
+        dsb
+        dmb
+        smc     #0
+        ldmfd   sp!, {r4-r12, pc}
+ENDPROC(omap_smc2)
+
+ENTRY(omap_modify_auxcoreboot0)
+        stmfd   sp!, {r1-r12, lr}
+        ldr     r12, =0x104
+        dsb
+        smc     #0
+        ldmfd   sp!, {r1-r12, pc}
+ENDPROC(omap_modify_auxcoreboot0)
+
+ENTRY(omap_auxcoreboot_addr)
+        stmfd   sp!, {r2-r12, lr}
+        ldr     r12, =0x105
+        dsb
+        smc     #0
+        ldmfd   sp!, {r2-r12, pc}
+ENDPROC(omap_auxcoreboot_addr)
+
+ENTRY(omap_read_auxcoreboot0)
+        stmfd   sp!, {r2-r12, lr}
+        ldr     r12, =0x103
+        dsb
+        smc     #0
+        mov     r0, r0, lsr #9
+        ldmfd   sp!, {r2-r12, pc}
+ENDPROC(omap_read_auxcoreboot0)