| Message ID | 20190722213958.5761-29-julien.grall@arm.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | xen/arm: Rework head.S to make it more compliant with the Arm Arm | expand |
On Mon, 22 Jul 2019, Julien Grall wrote: > Document the behavior and the main registers usage within enable_mmu(). > > Signed-off-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > Changes in v2: > - Patch added > --- > xen/arch/arm/arm32/head.S | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S > index ef8979959b..4081a52dfa 100644 > --- a/xen/arch/arm/arm32/head.S > +++ b/xen/arch/arm/arm32/head.S > @@ -422,6 +422,13 @@ virtphys_clash: > b fail > ENDPROC(create_page_tables) > > +/* > + * Turn on the Data Cache and the MMU. The function will return on the 1:1 > + * mapping. In other word, the caller is responsible to switch to the runtime > + * mapping. > + * > + * Clobbers r0 - r3 > + */ > enable_mmu: > PRINT("- Turning on paging -\r\n") > > -- > 2.11.0 >
diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S index ef8979959b..4081a52dfa 100644 --- a/xen/arch/arm/arm32/head.S +++ b/xen/arch/arm/arm32/head.S @@ -422,6 +422,13 @@ virtphys_clash: b fail ENDPROC(create_page_tables) +/* + * Turn on the Data Cache and the MMU. The function will return on the 1:1 + * mapping. In other word, the caller is responsible to switch to the runtime + * mapping. + * + * Clobbers r0 - r3 + */ enable_mmu: PRINT("- Turning on paging -\r\n")
Document the behavior and the main registers usage within enable_mmu(). Signed-off-by: Julien Grall <julien.grall@arm.com> --- Changes in v2: - Patch added --- xen/arch/arm/arm32/head.S | 7 +++++++ 1 file changed, 7 insertions(+)