ARM: zImage: no need to get the decompressed size from the filesystem

[linux-flexiantxendom0.git] / arch / arm / boot / compressed / head.S

diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index d1fd1cf..b541217 100644 (file)
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -187,7 +187,7 @@ not_angel:
                bl      cache_on
 
 restart:       adr     r0, LC0
-               ldmia   r0, {r1, r2, r3, r6, r9, r11, r12}
+               ldmia   r0, {r1, r2, r3, r6, r10, r11, r12}
                ldr     sp, [r0, #28]
 
                /*
@@ -196,6 +196,20 @@ restart:   adr     r0, LC0
                 */
                sub     r0, r0, r1              @ calculate the delta offset
                add     r6, r6, r0              @ _edata
+               add     r10, r10, r0            @ inflated kernel size location
+
+               /*
+                * The kernel build system appends the size of the
+                * decompressed kernel at the end of the compressed data
+                * in little-endian form.
+                */
+               ldrb    r9, [r10, #0]
+               ldrb    lr, [r10, #1]
+               orr     r9, r9, lr, lsl #8
+               ldrb    lr, [r10, #2]
+               ldrb    r10, [r10, #3]
+               orr     r9, r9, lr, lsl #16
+               orr     r9, r9, r10, lsl #24
 
 #ifndef CONFIG_ZBOOT_ROM
                /* malloc space is above the relocated stack (64k max) */
@@ -355,7 +369,7 @@ LC0:                .word   LC0                     @ r1
                .word   __bss_start             @ r2
                .word   _end                    @ r3
                .word   _edata                  @ r6
-               .word   _image_size             @ r9
+               .word   input_data_end - 4      @ r10 (inflated size location)
                .word   _got_start              @ r11
                .word   _got_end                @ ip
                .word   user_stack_end          @ sp