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| author | danh-arm <dan.handley@arm.com> | 2016-07-15 18:55:43 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-07-15 18:55:43 +0100 |
| commit | aadb1350eed3c18aec6cd999519cef55d93678b3 (patch) | |
| tree | d851cbd6afa9f9b14676cde93bbf4e49f0cfebf1 /include/plat/arm/board/common/v2m_def.h | |
| parent | 9306f135922bc7811dfc1e24a755c38ce2e671cd (diff) | |
| parent | 91fad6551ee3e5529f9b442cd4a084251cdebe1d (diff) | |
Merge pull request #662 from sandrine-bailleux-arm/sb/rodata-xn
Map read-only data as execute-never
Diffstat (limited to 'include/plat/arm/board/common/v2m_def.h')
| -rw-r--r-- | include/plat/arm/board/common/v2m_def.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/include/plat/arm/board/common/v2m_def.h b/include/plat/arm/board/common/v2m_def.h index 888792ed..7cee4e8f 100644 --- a/include/plat/arm/board/common/v2m_def.h +++ b/include/plat/arm/board/common/v2m_def.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: @@ -119,13 +119,26 @@ #define V2M_SP810_CTRL_TIM2_SEL (1 << 19) #define V2M_SP810_CTRL_TIM3_SEL (1 << 21) +/* + * The flash can be mapped either as read-only or read-write. + * + * If it is read-write then it should also be mapped as device memory because + * NOR flash programming involves sending a fixed, ordered sequence of commands. + * + * If it is read-only then it should also be mapped as: + * - Normal memory, because reading from NOR flash is transparent, it is like + * reading from RAM. + * - Non-executable by default. If some parts of the flash need to be executable + * then platform code is responsible for re-mapping the appropriate portion + * of it as executable. + */ #define V2M_MAP_FLASH0_RW MAP_REGION_FLAT(V2M_FLASH0_BASE,\ V2M_FLASH0_SIZE, \ MT_DEVICE | MT_RW | MT_SECURE) #define V2M_MAP_FLASH0_RO MAP_REGION_FLAT(V2M_FLASH0_BASE,\ V2M_FLASH0_SIZE, \ - MT_MEMORY | MT_RO | MT_SECURE) + MT_RO_DATA | MT_SECURE) #define V2M_MAP_IOFPGA MAP_REGION_FLAT(V2M_IOFPGA_BASE,\ V2M_IOFPGA_SIZE, \ |