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From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xenproject.org
Cc: andre.przywara@arm.com, Julien Grall <julien.grall@arm.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	andrii_anisov@epam.com, Oleksandr_Tyshchenko@epam.com
Subject: [Xen-devel] [PATCH 11/17] xen/arm64: head: Document enable_mmu()
Date: Mon, 10 Jun 2019 20:32:09 +0100	[thread overview]
Message-ID: <20190610193215.23704-12-julien.grall@arm.com> (raw)
In-Reply-To: <20190610193215.23704-1-julien.grall@arm.com>

Document the behavior and the main registers usage within enable_mmu().

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
 xen/arch/arm/arm64/head.S | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index 7b92c1c8eb..d673f7c0d8 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -583,6 +583,13 @@ virtphys_clash:
         ret
 ENDPROC(create_page_tables)
 
+/*
+ * Turn on the Data Cache and the MMU. The function will return on the ID
+ * mapping. In other word, the caller is responsible to switch to the runtime
+ * mapping.
+ *
+ * Clobbers x0 - x1
+ */
 enable_mmu:
         PRINT("- Turning on paging -\r\n")
 
-- 
2.11.0


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  parent reply	other threads:[~2019-06-10 19:32 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-10 19:31 [Xen-devel] [PATCH 00/17] xen/arm64: Rework head.S to make it more compliant with the Arm Arm Julien Grall
2019-06-10 19:31 ` [Xen-devel] [PATCH 01/17] xen/arm64: head Mark the end of subroutines with ENDPROC Julien Grall
2019-06-25 23:23   ` Stefano Stabellini
2019-06-10 19:32 ` [Xen-devel] [PATCH 02/17] xen/arm64: head: Don't clobber x30/lr in the macro PRINT Julien Grall
2019-06-25 23:35   ` Stefano Stabellini
2019-06-25 23:59     ` Stefano Stabellini
2019-06-26  9:07       ` Julien Grall
2019-06-26 15:27         ` Stefano Stabellini
2019-06-26 15:28           ` Julien Grall
2019-06-26 18:32             ` Stefano Stabellini
2019-06-26 19:24               ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 03/17] xen/arm64: head: Rework UART initialization on boot CPU Julien Grall
2019-06-25 23:49   ` Stefano Stabellini
2019-06-10 19:32 ` [Xen-devel] [PATCH 04/17] xen/arm64: head: Don't "reserve" x24 for the CPUID Julien Grall
2019-06-26  0:01   ` Stefano Stabellini
2019-06-26  9:09     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 05/17] xen/arm64: head: Introduce print_reg Julien Grall
2019-06-26  0:09   ` Stefano Stabellini
2019-06-26  9:10     ` Julien Grall
2019-07-15 18:46   ` Volodymyr Babchuk
2019-07-16  9:55     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 06/17] xen/arm64: head: Introduce distinct paths for the boot CPU and secondary CPUs Julien Grall
2019-06-26  1:00   ` Stefano Stabellini
2019-06-26  9:14     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 07/17] xen/arm64: head: Rework and document check_cpu_mode() Julien Grall
2019-06-26  1:00   ` Stefano Stabellini
2019-06-10 19:32 ` [Xen-devel] [PATCH 08/17] xen/arm64: head: Rework and document zero_bss() Julien Grall
2019-06-26  1:01   ` Stefano Stabellini
2019-06-26  9:16     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 09/17] xen/arm64: head: Improve coding style and document cpu_init() Julien Grall
2019-06-26  1:01   ` Stefano Stabellini
2019-06-26 10:34     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 10/17] xen/arm64: head: Improve coding style and document create_pages_tables() Julien Grall
2019-06-26  1:03   ` Stefano Stabellini
2019-06-26 11:20     ` Julien Grall
2019-06-10 19:32 ` Julien Grall [this message]
2019-06-26  1:03   ` [Xen-devel] [PATCH 11/17] xen/arm64: head: Document enable_mmu() Stefano Stabellini
2019-06-26 11:23     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 12/17] xen/arm64: head: Move assembly switch to the runtime PT in secondary CPUs path Julien Grall
2019-06-26  1:03   ` Stefano Stabellini
2019-06-10 19:32 ` [Xen-devel] [PATCH 13/17] xen/arm64: head: Don't setup the fixmap on secondary CPUs Julien Grall
2019-06-26 18:51   ` Stefano Stabellini
2019-06-26 19:26     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 14/17] xen/arm64: head: Remove ID map as soon as it is not used Julien Grall
2019-06-26 20:25   ` Stefano Stabellini
2019-06-26 20:39     ` Julien Grall
2019-06-26 20:44       ` Andrew Cooper
2019-06-28  0:36       ` Stefano Stabellini
2019-06-27 18:55   ` Stefano Stabellini
2019-06-27 19:30     ` Julien Grall
2019-07-10 19:39       ` Julien Grall
2019-07-30 17:33       ` Stefano Stabellini
2019-07-30 19:52         ` Julien Grall
2019-07-31 20:40           ` Stefano Stabellini
2019-07-31 21:07             ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 15/17] xen/arm64: head: Rework and document setup_fixmap() Julien Grall
2019-06-26 19:01   ` Stefano Stabellini
2019-06-26 19:30     ` Julien Grall
2019-06-27  9:29       ` Julien Grall
2019-06-27 15:38         ` Stefano Stabellini
2019-06-26 19:02   ` Stefano Stabellini
2019-06-27  9:19     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 16/17] xen/arm64: head: Rework and document launch() Julien Grall
2019-06-26 19:12   ` Stefano Stabellini
2019-06-26 20:09     ` Julien Grall
2019-06-10 19:32 ` [Xen-devel] [PATCH 17/17] xen/arm64: Zero BSS after the MMU and D-cache is turned on Julien Grall
2019-06-26 19:29   ` Stefano Stabellini
2019-06-26 20:07     ` Julien Grall
2019-06-26 21:08       ` Stefano Stabellini
2019-06-27 11:04         ` Julien Grall

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