From e81495224f732f17ae6f379baf23b90cd1d5cb5f Mon Sep 17 00:00:00 2001 From: York Sun Date: Fri, 4 Dec 2015 11:57:07 -0800 Subject: Reserve secure memory Secure memory is at the end of memory, separated and reserved from OS, tracked by gd->secure_ram. Secure memory can host MMU tables, security monitor, etc. This is different from PRAM used to reserve private memory. PRAM offers memory at the top of u-boot memory, not necessarily the real end of memory for systems with very large DDR. Using the end of memory simplifies MMU setup and avoid memory fragmentation. "bdinfo" command shows gd->secure_ram value if this memory is marked as secured. Signed-off-by: York Sun --- README | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'README') diff --git a/README b/README index 4fee7066d5d..6ea1af2678e 100644 --- a/README +++ b/README @@ -3869,6 +3869,14 @@ Configuration Settings: Scratch address used by the alternate memory test You only need to set this if address zero isn't writeable +- CONFIG_SYS_MEM_RESERVE_SECURE + If defined, the size of CONFIG_SYS_MEM_RESERVE_SECURE memory + is substracted from total RAM and won't be reported to OS. + This memory can be used as secure memory. A variable + gd->secure_ram is used to track the location. In systems + the RAM base is not zero, or RAM is divided into banks, + this variable needs to be recalcuated to get the address. + - CONFIG_SYS_MEM_TOP_HIDE (PPC only): If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, this specified memory area will get subtracted from the top -- cgit v1.3.1 From aabd7ddb889aec3c6c4139974f66a44e2ce46ba5 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 7 Dec 2015 11:05:29 -0800 Subject: common: Rewrite hiding the end of memory As the name may be confusing, the CONFIG_SYS_MEM_TOP_HIDE reserves some memory from the end of ram, tracked by gd->ram_size. It is not always the top of u-boot visible memory. Rewrite the macro with a weak function to provide flexibility for complex calcuation. Legacy use of this macro is still supported. Signed-off-by: York Sun Reviewed-by: Simon Glass --- README | 2 +- common/board_f.c | 23 +++++++++++++++-------- 2 files changed, 16 insertions(+), 9 deletions(-) (limited to 'README') diff --git a/README b/README index 6ea1af2678e..4aa2aaeb23e 100644 --- a/README +++ b/README @@ -3877,7 +3877,7 @@ Configuration Settings: the RAM base is not zero, or RAM is divided into banks, this variable needs to be recalcuated to get the address. -- CONFIG_SYS_MEM_TOP_HIDE (PPC only): +- CONFIG_SYS_MEM_TOP_HIDE: If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, this specified memory area will get subtracted from the top (end) of RAM and won't get "touched" at all by U-Boot. By diff --git a/common/board_f.c b/common/board_f.c index bd5a4862480..8094ac4efe0 100644 --- a/common/board_f.c +++ b/common/board_f.c @@ -317,6 +317,15 @@ __weak ulong board_get_usable_ram_top(ulong total_size) return gd->ram_top; } +__weak phys_size_t board_reserve_ram_top(phys_size_t ram_size) +{ +#ifdef CONFIG_SYS_MEM_TOP_HIDE + return ram_size - CONFIG_SYS_MEM_TOP_HIDE; +#else + return ram_size; +#endif +} + static int setup_dest_addr(void) { debug("Monitor len: %08lX\n", gd->mon_len); @@ -333,19 +342,17 @@ static int setup_dest_addr(void) */ gd->secure_ram = gd->ram_size; #endif -#if defined(CONFIG_SYS_MEM_TOP_HIDE) /* * Subtract specified amount of memory to hide so that it won't * get "touched" at all by U-Boot. By fixing up gd->ram_size * the Linux kernel should now get passed the now "corrected" - * memory size and won't touch it either. This should work - * for arch/ppc and arch/powerpc. Only Linux board ports in - * arch/powerpc with bootwrapper support, that recalculate the - * memory size from the SDRAM controller setup will have to - * get fixed. + * memory size and won't touch it either. This has been used + * by arch/powerpc exclusively. Now ARMv8 takes advantage of + * thie mechanism. If memory is split into banks, addresses + * need to be calculated. */ - gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE; -#endif + gd->ram_size = board_reserve_ram_top(gd->ram_size); + #ifdef CONFIG_SYS_SDRAM_BASE gd->ram_top = CONFIG_SYS_SDRAM_BASE; #endif -- cgit v1.3.1 From c04921414c087e15f8fa82d808a25e9338a7e8d5 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 7 Dec 2015 11:08:58 -0800 Subject: armv8: fsl-layerscale: Rewrite reserving memory for MC and debug server MC and debug server are not board-specific. Move reserving memory to SoC file, using the new board_reserve_ram_top function. Reduce debug server memory by 2MB to make room for secure memory. In the system with MC and debug server, the top of u-boot memory is not the end of memory. PRAM is not used for this reservation. Signed-off-by: York Sun --- README | 4 ++-- arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 21 +++++++++++++++++++++ board/freescale/ls2080a/ls2080a.c | 17 ----------------- board/freescale/ls2080aqds/ls2080aqds.c | 17 ----------------- board/freescale/ls2080ardb/ls2080ardb.c | 17 ----------------- include/configs/ls2080a_common.h | 9 ++------- 6 files changed, 25 insertions(+), 60 deletions(-) (limited to 'README') diff --git a/README b/README index 4aa2aaeb23e..43f307f30fd 100644 --- a/README +++ b/README @@ -5056,8 +5056,8 @@ This firmware often needs to be loaded during U-Boot booting. - CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE Define minimum DDR size required for debug server image -- CONFIG_SYS_MEM_TOP_HIDE_MIN - Define minimum DDR size to be hided from top of the DDR memory +- CONFIG_SYS_MC_RSV_MEM_ALIGN + Define alignment of reserved memory MC requires Reproducible builds ------------------- diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c index 87ccaf166f9..6ea28ed5cb0 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c @@ -636,3 +636,24 @@ void reset_cpu(ulong addr) val |= 0x02; scfg_out32(rstcr, val); } + +phys_size_t board_reserve_ram_top(phys_size_t ram_size) +{ + phys_size_t ram_top = ram_size; + +#ifdef CONFIG_SYS_MEM_TOP_HIDE +#error CONFIG_SYS_MEM_TOP_HIDE not to be used together with this function +#endif +/* Carve the Debug Server private DRAM block from the end of DRAM */ +#ifdef CONFIG_FSL_DEBUG_SERVER + ram_top -= debug_server_get_dram_block_size(); +#endif + +/* Carve the MC private DRAM block from the end of DRAM */ +#ifdef CONFIG_FSL_MC_ENET + ram_top -= mc_get_dram_block_size(); + ram_top &= ~(CONFIG_SYS_MC_RSV_MEM_ALIGN - 1); +#endif + + return ram_top; +} diff --git a/board/freescale/ls2080a/ls2080a.c b/board/freescale/ls2080a/ls2080a.c index 827fbf08354..7bce8b0772a 100644 --- a/board/freescale/ls2080a/ls2080a.c +++ b/board/freescale/ls2080a/ls2080a.c @@ -68,23 +68,6 @@ int arch_misc_init(void) } #endif -unsigned long get_dram_size_to_hide(void) -{ - unsigned long dram_to_hide = 0; - -/* Carve the Debug Server private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_DEBUG_SERVER - dram_to_hide += debug_server_get_dram_block_size(); -#endif - -/* Carve the MC private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_MC_ENET - dram_to_hide += mc_get_dram_block_size(); -#endif - - return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN); -} - int board_eth_init(bd_t *bis) { int error = 0; diff --git a/board/freescale/ls2080aqds/ls2080aqds.c b/board/freescale/ls2080aqds/ls2080aqds.c index 1f990720a87..aa256a225be 100644 --- a/board/freescale/ls2080aqds/ls2080aqds.c +++ b/board/freescale/ls2080aqds/ls2080aqds.c @@ -253,23 +253,6 @@ int arch_misc_init(void) } #endif -unsigned long get_dram_size_to_hide(void) -{ - unsigned long dram_to_hide = 0; - -/* Carve the Debug Server private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_DEBUG_SERVER - dram_to_hide += debug_server_get_dram_block_size(); -#endif - -/* Carve the MC private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_MC_ENET - dram_to_hide += mc_get_dram_block_size(); -#endif - - return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN); -} - #ifdef CONFIG_FSL_MC_ENET void fdt_fixup_board_enet(void *fdt) { diff --git a/board/freescale/ls2080ardb/ls2080ardb.c b/board/freescale/ls2080ardb/ls2080ardb.c index 2ae9d6cf457..c63b6396250 100644 --- a/board/freescale/ls2080ardb/ls2080ardb.c +++ b/board/freescale/ls2080ardb/ls2080ardb.c @@ -219,23 +219,6 @@ int arch_misc_init(void) } #endif -unsigned long get_dram_size_to_hide(void) -{ - unsigned long dram_to_hide = 0; - -/* Carve the Debug Server private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_DEBUG_SERVER - dram_to_hide += debug_server_get_dram_block_size(); -#endif - -/* Carve the MC private DRAM block from the end of DRAM */ -#ifdef CONFIG_FSL_MC_ENET - dram_to_hide += mc_get_dram_block_size(); -#endif - - return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN); -} - #ifdef CONFIG_FSL_MC_ENET void fdt_fixup_board_enet(void *fdt) { diff --git a/include/configs/ls2080a_common.h b/include/configs/ls2080a_common.h index 969aed698cf..4ae7d11685f 100644 --- a/include/configs/ls2080a_common.h +++ b/include/configs/ls2080a_common.h @@ -195,10 +195,9 @@ unsigned long long get_qixis_addr(void); * 512MB aligned, so the min size to hide is 512MB. */ #if defined(CONFIG_FSL_MC_ENET) || defined(CONFIG_FSL_DEBUG_SERVER) -#define CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE (256UL * 1024 * 1024) +#define CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE (254UL * 1024 * 1024) #define CONFIG_SYS_LS_MC_DRAM_BLOCK_MIN_SIZE (256UL * 1024 * 1024) -#define CONFIG_SYS_MEM_TOP_HIDE_MIN (512UL * 1024 * 1024) -#define CONFIG_SYS_MEM_TOP_HIDE get_dram_size_to_hide() +#define CONFIG_SYS_MC_RSV_MEM_ALIGN (512UL * 1024 * 1024) #endif /* PCIe */ @@ -290,10 +289,6 @@ unsigned long long get_qixis_addr(void); #define CONFIG_AUTO_COMPLETE #define CONFIG_SYS_MAXARGS 64 /* max command args */ -#ifndef __ASSEMBLY__ -unsigned long get_dram_size_to_hide(void); -#endif - #define CONFIG_PANIC_HANG /* do not reset board on panic */ #define CONFIG_SPL_BSS_START_ADDR 0x80100000 -- cgit v1.3.1