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imx233/fuze+: prepare target to enable MMU

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30199 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2011-07-23 11:45:18 +00:00
parent 3f8bf5e041
commit 06c94740e5
4 changed files with 35 additions and 16 deletions
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27
firmware/target/arm/imx233/system-imx233.c
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@ -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)