This set is to change MMU tables so DDR is in non-secure mode that non-secure master such as SDHC DMA can access the data. To mix secure and non-secure MMU entries, the MMU tables themselves have to be in secure memory. A small portion memory is reserved at the end of DDR (before debug server and MC) to host secure application and the MMU tables.
This is different from existing armv7 secure_ram_addr() solution. U-boot can run in the middle of memory if the memory is large. Having security memory at the very end simplifies MMU setup. Tested on LS2085AQDS with a known non-secure master test. Changes in v6: Move flag macros and comments of secure_ram into 1st path in this set Move cmd_bdinfo change to 1st patch in this set Rearrange #ifdef CONFIG_SYS_MEM_RESERVE_SECURE Changes in v5: Put ifdef where gd->secure_ram is used Changes in v4: Drop RFC from patch prefix Drop excessive mmu table for secure ram for early MMU Update commit message accordingly Mark QBMan cacheable portal memory non-secure Changes in v3: Put ifdef around secure_ram Move defining CONFIG_SYS_MEM_RESERVE_SECURE to patch 2/2 Replace CONFIG_FSL_PPA_RESERVED_DRAM_SIZE with CONFIG_SYS_MEM_RESERVE_SECURE Sanity check gd->secure_ram before using Define CONFIG_SYS_MEM_RESERVE_SECURE in SoC header file Include ls1043ardb Modified commit message. Changes in v2: Do not use CONFIG_SYS_MEM_TOP_HIDE mechanism Move gd->arch.secure_ram to gd->secure_ram. Change the calculation of gd->secure_ram accordingly. Chnage commit message slightly accordingly. Changes in v1: Initial patch. Depends on http://patchwork.ozlabs.org/patch/540248/ York Sun (2): Reserve secure memory armv8: fsl-layerscape: Make DDR non secure in MMU tables README | 8 ++ arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 111 +++++++++++++++++++-- arch/arm/include/asm/arch-fsl-layerscape/config.h | 6 ++ arch/arm/include/asm/arch-fsl-layerscape/cpu.h | 14 ++- board/freescale/ls1043ardb/ddr.c | 4 + board/freescale/ls2085a/ddr.c | 15 +++ board/freescale/ls2085aqds/ddr.c | 15 +++ board/freescale/ls2085ardb/ddr.c | 15 +++ common/board_f.c | 9 ++ common/cmd_bdinfo.c | 6 ++ include/asm-generic/global_data.h | 14 +++ 11 files changed, 202 insertions(+), 15 deletions(-) -- 1.7.9.5 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
