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author | Rafaël Carré <rafael.carre@gmail.com> | 2009-06-08 23:05:33 +0000 |
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committer | Rafaël Carré <rafael.carre@gmail.com> | 2009-06-08 23:05:33 +0000 |
commit | f5041538574c039b07c4db8d261bd33ec0f3bab0 (patch) | |
tree | d4fc2f48c7209e3303b5c48abc211e3a961a7dac /firmware/target/arm/crt0.S | |
parent | 20a78a36f36967651032ab10b4ee31412e37b69d (diff) | |
download | rockbox-f5041538574c039b07c4db8d261bd33ec0f3bab0.tar.gz rockbox-f5041538574c039b07c4db8d261bd33ec0f3bab0.zip |
FS#10048 : enable MMU and data cache on Sansa AMS to give a major speed up
- cache IRAM and DRAM
- map IRAM just next to DRAM to remove the need for -mlong-calls and reduce binsize
- tweak delays in Fuze button code
- tweak delays in Clip button code (down button sometimes doesn't respond anyway : an alternate driver is being worked on)
Before reporting any problem, please check your filesystem or format your player from the OF
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21228 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/crt0.S')
-rw-r--r-- | firmware/target/arm/crt0.S | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/firmware/target/arm/crt0.S b/firmware/target/arm/crt0.S index 35d0aecccb..4bd01e4952 100644 --- a/firmware/target/arm/crt0.S +++ b/firmware/target/arm/crt0.S | |||
@@ -58,16 +58,8 @@ newstart: | |||
58 | msr cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */ | 58 | msr cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */ |
59 | 59 | ||
60 | #if CONFIG_CPU==AS3525 && !defined(BOOTLOADER) | 60 | #if CONFIG_CPU==AS3525 && !defined(BOOTLOADER) |
61 | 61 | /* Setup MMU : has to be done before accessing IRAM ! */ | |
62 | /* relocate vectors */ | 62 | bl memory_init |
63 | mov r1, #0 @ destination | ||
64 | ldr r2, =_vectorscopy @ source | ||
65 | ldr r3, =_vectorsend @ end | ||
66 | |||
67 | 1: ldr r0, [r2], #4 | ||
68 | str r0, [r1], #4 | ||
69 | cmp r1, r3 | ||
70 | bne 1b | ||
71 | 63 | ||
72 | /* Zero out IBSS */ | 64 | /* Zero out IBSS */ |
73 | ldr r2, =_iedata | 65 | ldr r2, =_iedata |