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Thumb-2: Implement the unified arch/arm/lib functions

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This patch adds the ARM/Thumb-2 unified support for the arch/arm/lib/*
files.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas
2009-07-24 12:32:57 +01:00
parent 347c8b70b1
commit 8b592783a2
20 changed files with 229 additions and 98 deletions
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24
arch/arm/lib/copy_template.S
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@@ -57,6 +57,13 @@
*
* Restore registers with the values previously saved with the
* 'preserv' macro. Called upon code termination.
*
* LDR1W_SHIFT
* STR1W_SHIFT
*
* Correction to be applied to the "ip" register when branching into
* the ldr1w or str1w instructions (some of these macros may expand to
* than one 32bit instruction in Thumb-2)
*/
@@ -99,9 +106,15 @@
5: ands ip, r2, #28
rsb ip, ip, #32
#if LDR1W_SHIFT > 0
lsl ip, ip, #LDR1W_SHIFT
#endif
addne pc, pc, ip @ C is always clear here
b 7f
6: nop
6:
.rept (1 << LDR1W_SHIFT)
W(nop)
.endr
ldr1w r1, r3, abort=20f
ldr1w r1, r4, abort=20f
ldr1w r1, r5, abort=20f
@@ -110,9 +123,16 @@
ldr1w r1, r8, abort=20f
ldr1w r1, lr, abort=20f
#if LDR1W_SHIFT < STR1W_SHIFT
lsl ip, ip, #STR1W_SHIFT - LDR1W_SHIFT
#elif LDR1W_SHIFT > STR1W_SHIFT
lsr ip, ip, #LDR1W_SHIFT - STR1W_SHIFT
#endif
add pc, pc, ip
nop
nop
.rept (1 << STR1W_SHIFT)
W(nop)
.endr
str1w r0, r3, abort=20f
str1w r0, r4, abort=20f
str1w r0, r5, abort=20f