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| author | Julien Grall <julien.grall@linaro.org> | 2013-04-27 22:52:44 +0100 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-05-13 12:00:00 +0100 |
| commit | 3c186690bb6c8e7da7a24f83c8d8c884b1ba46a2 (patch) | |
| tree | afcb20bad8334cdb567737747b8ac6a46c249c7c /xen/include/asm-arm/platform.h | |
| parent | 93f8194038ebddca5898cf889b45a5dc0ba903c1 (diff) | |
| download | xen-3c186690bb6c8e7da7a24f83c8d8c884b1ba46a2.tar.gz xen-3c186690bb6c8e7da7a24f83c8d8c884b1ba46a2.tar.bz2 xen-3c186690bb6c8e7da7a24f83c8d8c884b1ba46a2.zip | |
xen/arm: WORKAROUND 1:1 memory mapping for dom0
Currently xen doesn't implement SYS MMU. When a device will talk with dom0
with DMA request the domain will use GFN instead of MFN.
For instance on the arndale board, without this patch the network doesn't
work.
The 1:1 mapping is a workaround and MUST be remove as soon as a SYS MMU is
implemented in XEN.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'xen/include/asm-arm/platform.h')
| -rw-r--r-- | xen/include/asm-arm/platform.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h index e116265b24..f460e9cb67 100644 --- a/xen/include/asm-arm/platform.h +++ b/xen/include/asm-arm/platform.h @@ -28,6 +28,12 @@ struct platform_desc { uint32_t (*quirks)(void); }; +/* + * Quirk to map dom0 memory in 1:1 + * Usefull on platform where System MMU is not yet implemented + */ +#define PLATFORM_QUIRK_DOM0_MAPPING_11 (1 << 0) + int __init platform_init(void); int __init platform_init_time(void); int __init platform_specific_mapping(struct domain *d); |