[PATCH] Compile asm-files to thumb2

[Vladimir 'φ-coder/phcoder' Serbinenko]

diff --git a/grub-core/kern/arm/cache.S b/grub-core/kern/arm/cache.S
index 8522d24..2ad774d 100644
--- a/grub-core/kern/arm/cache.S
+++ b/grub-core/kern/arm/cache.S
@@ -21,7 +21,12 @@
        .file   "cache.S"
        .text
        .syntax unified
+#if !defined (__thumb2__) || !defined (ARMV7)
        .arm
+#else
+       .thumb
+#endif
+
 #if !defined (ARMV6) && !defined (ARMV7)
 # error Unsupported architecture version!
 #endif
diff --git a/grub-core/kern/arm/cache_armv7.S b/grub-core/kern/arm/cache_armv7.S
index 0c16b10..aa42fad 100644
--- a/grub-core/kern/arm/cache_armv7.S
+++ b/grub-core/kern/arm/cache_armv7.S
@@ -21,8 +21,13 @@
        .file   "cache_armv7.S"
        .text
        .syntax unified
-       .arm
+#if !defined (__thumb2__)
        .arch   armv7a
+       .arm
+#else
+       .arch   armv7
+       .thumb
+#endif
 # define DMB   dmb
 # define DSB   dsb
 # define ISB   isb
@@ -58,11 +63,17 @@ clean_invalidate_dcache:
        @ read current cache information
        mrc     p15, 1, r8, c0, c0, 0   @ Read CCSIDR
        lsr     r3, r8, #13             @ Number of sets -1
-       ldr     r9, =0x3fff
-       and     r3, r3, r9
+
+       @ Keep only 14 bits of r3
+       lsl     r3, r3, #18
+       lsr     r3, r3, #18
+
        lsr     r4, r8, #3              @ Number of ways -1
-       ldr     r9, =0x1ff
-       and     r4, r4, r9
+
+       @ Keep only 9  bits of r4
+       lsl     r4, r4, #23
+       lsr     r4, r4, #23
+
        and     r7, r8, #7              @ log2(line size in words) - 2
        add     r7, r7, #2              @  adjust
        mov     r8, #1
diff --git a/grub-core/lib/arm/setjmp.S b/grub-core/lib/arm/setjmp.S
index 4f15679..b6febfb 100644
--- a/grub-core/lib/arm/setjmp.S
+++ b/grub-core/lib/arm/setjmp.S
@@ -24,7 +24,11 @@
 GRUB_MOD_LICENSE "GPLv3+"
 
        .syntax unified
+#if !defined (__thumb2__)
        .arm
+#else
+       .thumb
+#endif
 
        .text
 
@@ -32,7 +36,8 @@ GRUB_MOD_LICENSE "GPLv3+"
  * int grub_setjmp (grub_jmp_buf env)
  */
 FUNCTION(grub_setjmp)
-       stm     r0, { r4-r11, sp, lr }
+       stm     r0, { r4-r11, lr }
+       str     sp, [r0, #36 ]
        mov     r0, #0
        bx      lr
 
@@ -40,7 +45,10 @@ FUNCTION(grub_setjmp)
  * int grub_longjmp (grub_jmp_buf env, int val)
  */
 FUNCTION(grub_longjmp)
-       ldm     r0, { r4-r11, sp, lr }
+       ldm     r0, { r4-r11, lr }
+       ldr     sp, [r0, #36 ]
        movs    r0, r1
-       moveq   r0, #1
+       bne     1f
+       mov     r0, #1
+1:
        bx      lr

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