diff options
| author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-04-19 14:10:59 +0000 |
|---|---|---|
| committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-04-19 14:10:59 +0000 |
| commit | dc8db2a82002bab26494a7c482148f4865056166 (patch) | |
| tree | 23f1ffeddcd51714c9c66b7e903701421d0121b8 | |
| parent | 42c7fb6b8b590f537f253f101fefcf61dc4bc79f (diff) | |
MIPS: set load address of .iram to the start of .bss so RAM doesn't get wasted
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20741 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | firmware/target/mips/ingenic_jz47xx/app.lds | 7 | ||||
| -rw-r--r-- | firmware/target/mips/ingenic_jz47xx/crt0.S | 32 |
2 files changed, 22 insertions, 17 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/app.lds b/firmware/target/mips/ingenic_jz47xx/app.lds index e17e204fb1..b6e06a7b14 100644 --- a/firmware/target/mips/ingenic_jz47xx/app.lds +++ b/firmware/target/mips/ingenic_jz47xx/app.lds @@ -70,7 +70,10 @@ SECTIONS . = ALIGN(4); - .iram IRAMORIG: + /* Set the load address of .iram at the same address as .bss + * so RAM won't be wasted as .iram in the end will get copied + * to IRAM. */ + .iram IRAMORIG: AT (_edata) { _iramstart = .; *(.vectors.1); @@ -88,7 +91,7 @@ SECTIONS KEEP(*(.vectors)) *(.vectors); _iramend = .; - } > IRAM AT> DRAM + } > IRAM _iramcopy = LOADADDR(.iram); . = ALIGN(4); diff --git a/firmware/target/mips/ingenic_jz47xx/crt0.S b/firmware/target/mips/ingenic_jz47xx/crt0.S index af82ad5d12..4223ee4904 100644 --- a/firmware/target/mips/ingenic_jz47xx/crt0.S +++ b/firmware/target/mips/ingenic_jz47xx/crt0.S @@ -122,6 +122,23 @@ _init_cache_loop: /* ---------------------------------------------------- + Copy IRAM section + * copy IRAM first before BSS gets cleared, as both + have the same address + ---------------------------------------------------- + */ + la t0, _iramcopy + la t1, _iramstart + la t2, _iramend +_init_iram_loop: + lw t3, 0(t0) + sw t3, 0(t1) + addiu t1, 4 + bne t1, t2, _init_iram_loop + addiu t0, 4 + + /* + ---------------------------------------------------- Clear BSS section ---------------------------------------------------- */ @@ -143,21 +160,6 @@ _init_ibss_loop: sw zero, 0(t0) bne t0, t1, _init_ibss_loop addiu t0, 4 - - /* - ---------------------------------------------------- - Copy IRAM section - ---------------------------------------------------- - */ - la t0, _iramcopy - la t1, _iramstart - la t2, _iramend -_init_iram_loop: - lw t3, 0(t0) - sw t3, 0(t1) - addiu t1, 4 - bne t1, t2, _init_iram_loop - addiu t0, 4 /* ---------------------------------------------------- |