diff options
| author | Amaury Pouly <pamaury@rockbox.org> | 2011-07-23 11:45:18 +0000 |
|---|---|---|
| committer | Amaury Pouly <pamaury@rockbox.org> | 2011-07-23 11:45:18 +0000 |
| commit | 06c94740e510d0ce04e069f34631a0539e9e6742 (patch) | |
| tree | 64035ab2001e3820ab0dd61e328d5fa16140f4c0 /firmware/target/arm | |
| parent | 3f8bf5e041fe052c859f283c9309118f3e791440 (diff) | |
imx233/fuze+: prepare target to enable MMU
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30199 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm')
| -rw-r--r-- | firmware/target/arm/imx233/boot.lds | 6 | ||||
| -rw-r--r-- | firmware/target/arm/imx233/system-imx233.c | 27 | ||||
| -rw-r--r-- | firmware/target/arm/mmu-arm.S | 4 |
3 files changed, 26 insertions, 11 deletions
diff --git a/firmware/target/arm/imx233/boot.lds b/firmware/target/arm/imx233/boot.lds index cb925b055e..0a8f0ed8f8 100644 --- a/firmware/target/arm/imx233/boot.lds +++ b/firmware/target/arm/imx233/boot.lds @@ -8,8 +8,8 @@ STARTUP(target/arm/imx233/crt0.o) MEMORY { - IRAM : ORIGIN = IRAM_ORIG, LENGTH = IRAM_SIZE - DRAM : ORIGIN = DRAM_ORIG, LENGTH = DRAM_SIZE - TTB_SIZE + IRAM : ORIGIN = IRAM_ORIG, LENGTH = IRAM_SIZE - TTB_SIZE + DRAM : ORIGIN = DRAM_ORIG, LENGTH = DRAM_SIZE - FRAME_SIZE } SECTIONS @@ -30,7 +30,7 @@ SECTIONS { _iramstart = .; // always 0 *(.vectors) - KEEP(*(.vectors));// otherwise there are no reference to it and the linker strip it + KEEP(*(.vectors));// otherwise there are no references to it and the linker strip it *(.icode) *(.irodata) *(.idata) diff --git a/firmware/target/arm/imx233/system-imx233.c b/firmware/target/arm/imx233/system-imx233.c index 58f12506df..c4a32dd46e 100644 --- a/firmware/target/arm/imx233/system-imx233.c +++ b/firmware/target/arm/imx233/system-imx233.c @@ -141,6 +141,25 @@ void imx233_softirq(int src, bool enable) __REG_CLR(HW_ICOLL_INTERRUPT(src)) = HW_ICOLL_INTERRUPT__SOFTIRQ; } +static void set_page_tables(void) +{ + /* map every memory region to itself */ + map_section(0, 0, 0x1000, CACHE_NONE); + + /* map RAM and enable caching for it */ + map_section(DRAM_ORIG, DRAM_ORIG, MEMORYSIZE, CACHE_ALL); + + /* enable buffered writing for the framebuffer */ + map_section((int)FRAME, (int)FRAME, 1, BUFFERED); +} + +void memory_init(void) +{ + ttb_init(); + set_page_tables(); + enable_mmu(); +} + void system_init(void) { /* disable all interrupts */ @@ -158,14 +177,6 @@ void system_init(void) imx233_timrot_init(); imx233_dma_init(); imx233_ssp_init(); - imx233_i2c_init(); -} - -void power_off(void) -{ - /* power down */ - HW_POWER_RESET = HW_POWER_RESET__UNLOCK | HW_POWER_RESET__PWD; - while(1); } bool imx233_us_elapsed(uint32_t ref, unsigned us_delay) diff --git a/firmware/target/arm/mmu-arm.S b/firmware/target/arm/mmu-arm.S index 24abfec1a7..39f0edbfce 100644 --- a/firmware/target/arm/mmu-arm.S +++ b/firmware/target/arm/mmu-arm.S @@ -44,6 +44,10 @@ /* MMU not present */ #define CACHE_SIZE 4 +#elif CONFIG_CPU == IMX233 +#define USE_MMU +#define CACHE_SIZE 16 + #else #error Cache settings unknown for this CPU ! |