mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
be893a5c09
LD20 / PXs3 boards are equipped with a large amount of memory beyond the 32 bit address range. U-Boot relocates itself to the end of the available RAM. This is a problem for DMA engines that only support 32 bit physical address, like the SDMA of SDHCI controllers. In fact, U-Boot does not need to run at the very end of RAM. It is rather troublesome for drivers with DMA engines because U-Boot does not have API like dma_set_mask(), so DMA silently fails, making the driver debugging difficult. Hide the memory region that exceeds the 32 bit address range. It can be done by simply carving out gd->ram_size. It would also possible to override get_effective_memsize() or to define CONFIG_MAX_MEM_MAPPED, but dram_init() is a good enough place to do this job. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> |
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| .. | ||
| arm32 | ||
| arm64 | ||
| bcu | ||
| boot-device | ||
| clk | ||
| debug-uart | ||
| dram | ||
| sbc | ||
| board_init.c | ||
| board_late_init.c | ||
| boards.c | ||
| cpu-info.c | ||
| debug.h | ||
| dram_init.c | ||
| init.h | ||
| Kconfig | ||
| Makefile | ||
| memconf.c | ||
| micro-support-card.c | ||
| micro-support-card.h | ||
| mmc-boot-mode.c | ||
| mmc-first-dev.c | ||
| pinctrl-glue.c | ||
| reset.c | ||
| sc-regs.h | ||
| sc64-regs.h | ||
| sg-regs.h | ||
| soc-info.c | ||
| soc-info.h | ||
| spl_board_init.c | ||