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From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 23/23] sunxi: A64: add 32-bit SPL support
Date: Sun, 4 Dec 2016 23:26:32 -0700	[thread overview]
Message-ID: <CAPnjgZ27N71SH61SePQpm9oH1hze43rs-rP3ZyejBtQCZhKStg@mail.gmail.com> (raw)
In-Reply-To: <1480902750-839-24-git-send-email-andre.przywara@arm.com>

Hi Andre,

On 4 December 2016 at 18:52, Andre Przywara <andre.przywara@arm.com> wrote:
> When compiling the SPL for the Allwinner A64 in AArch64 mode, we can't
> use the more compact Thumb2 encoding, which only exists for AArch32
> code. This makes the SPL rather big, up to a point where any code
> additions or even a different compiler may easily exceed the 32KB limit
> that the Allwinner BROM imposes.
> Introduce a separate, mostly generic sun50i-a64 configuration, which
> defines the CPU_V7 symbol and thus will create a 32-bit binary using
> the memory-saving Thumb2 encoding.
> This should only be used for the SPL, the U-Boot proper should still be
> using the existing 64-bit configuration. The SPL code can switch to
> AArch64 if needed, so a 32-bit SPL can be combined with a 64-bit U-Boot
> proper to eventually launch arm64 kernels.

So if I understand correctly, you want SPL to be 32-bit and U-Boot
proper to be 64-bit? And you are adding a new board config for that?

Instead, can you do something similar to tegra, which uses ARMv4t for
SPL and ARMv7 for U-Boot proper?

>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
>  board/sunxi/Kconfig            | 14 ++++++++++++--
>  configs/pine64_plus_defconfig  |  2 +-
>  configs/sun50i_spl32_defconfig | 10 ++++++++++
>  include/configs/sunxi-common.h |  2 +-
>  4 files changed, 24 insertions(+), 4 deletions(-)
>  create mode 100644 configs/sun50i_spl32_defconfig

Regards,
Simon

  reply	other threads:[~2016-12-05  6:26 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-05  1:52 [U-Boot] [PATCH v2 00/23] sunxi: Allwinner A64: SPL support Andre Przywara
2016-12-05  1:52 ` [U-Boot] [PATCH v2 01/23] sun6i: Restrict some register initialization to Allwinner A31 SoC Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05  7:17   ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 02/23] armv8: prevent using THUMB Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05  7:30   ` Maxime Ripard
2016-12-05 21:57   ` Tom Rini
2016-12-05  1:52 ` [U-Boot] [PATCH v2 03/23] armv8: add lowlevel_init.S Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-17  2:55     ` André Przywara
2016-12-17 22:46       ` Simon Glass
2016-12-05 21:56   ` Tom Rini
2016-12-06  8:04     ` André Przywara
2016-12-06 12:18       ` Tom Rini
2016-12-05  1:52 ` [U-Boot] [PATCH v2 04/23] SPL: tiny-printf: add "l" modifier Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05  8:01   ` Siarhei Siamashka
2016-12-05  1:52 ` [U-Boot] [PATCH v2 05/23] move UL() macro from armv8/mmu.h into common.h Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 06/23] SPL: make struct spl_image 64-bit safe Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05 22:04   ` Tom Rini
2016-12-06 10:49   ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 07/23] armv8: add simple sdelay implementation Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 08/23] armv8: move reset branch into boot hook Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05 13:43     ` Andre Przywara
2016-12-08 22:21       ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 09/23] ARM: boot0 hook: remove macro, include whole header file Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-30 20:13   ` Steve Rae
2016-12-05  1:52 ` [U-Boot] [PATCH v2 10/23] sunxi: introduce extra config option for boot0 header Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05 15:49     ` Andre Przywara
2016-12-06 10:52   ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 11/23] sunxi: A64: do an RMR switch if started in AArch32 mode Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-05 10:41     ` Andre Przywara
2016-12-06 10:56       ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 12/23] sunxi: provide default DRAM config for sun50i in Kconfig Andre Przywara
2016-12-05  6:25   ` Simon Glass
2016-12-06 10:56   ` Maxime Ripard
2016-12-06 11:21     ` Andre Przywara
2016-12-12 12:33       ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 13/23] sunxi: H3: add and rename some DRAM contoller registers Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-17  2:30     ` André Przywara
2016-12-06 10:58   ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 14/23] sunxi: H3: add DRAM controller single bit delay support Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-05  7:58     ` Chen-Yu Tsai
2016-12-05 11:28       ` Andre Przywara
2016-12-07  3:48         ` Simon Glass
2016-12-17  2:33           ` André Przywara
2016-12-06 11:02   ` Maxime Ripard
2016-12-05  1:52 ` [U-Boot] [PATCH v2 15/23] sunxi: A64: use H3 DRAM initialization code for A64 Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-16 17:30     ` Andre Przywara
2016-12-17 22:48       ` Simon Glass
2016-12-06 11:20   ` Maxime Ripard
2016-12-06 14:15     ` Andre Przywara
2016-12-12 12:29       ` Maxime Ripard
2016-12-12 16:06         ` Andre Przywara
2016-12-05  1:52 ` [U-Boot] [PATCH v2 16/23] sunxi: H3/A64: fix non-ODT setting Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 17/23] sunxi: DRAM: fix H3 DRAM size display on aarch64 Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 18/23] sunxi: A64: enable SPL Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-16 17:40     ` Andre Przywara
2016-12-17 22:48       ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 19/23] SPL: read and store arch property from U-Boot image Andre Przywara
2016-12-05 22:56   ` Tom Rini
2016-12-05  1:52 ` [U-Boot] [PATCH v2 20/23] Makefile: use "arm64" architecture for U-Boot image files Andre Przywara
2016-12-05 23:11   ` Tom Rini
2016-12-05  1:52 ` [U-Boot] [PATCH v2 21/23] ARM: SPL/FIT: differentiate between arm and arm64 arch properties Andre Przywara
2016-12-06  0:27   ` Tom Rini
2016-12-05  1:52 ` [U-Boot] [PATCH v2 22/23] sunxi: introduce RMR switch to enter payloads in 64-bit mode Andre Przywara
2016-12-05  6:26   ` Simon Glass
2016-12-05  1:52 ` [U-Boot] [PATCH v2 23/23] sunxi: A64: add 32-bit SPL support Andre Przywara
2016-12-05  6:26   ` Simon Glass [this message]
2016-12-17 14:44     ` André Przywara
2016-12-19  8:20       ` Maxime Ripard
2016-12-19 10:26         ` Andre Przywara
2016-12-06 11:28   ` Maxime Ripard
2016-12-06 12:22     ` Andre Przywara
2016-12-12 15:13       ` Maxime Ripard
2016-12-12 16:04         ` Andre Przywara
2016-12-12 16:18           ` Chen-Yu Tsai
2016-12-12 16:32             ` Andre Przywara
2016-12-16 14:52           ` Maxime Ripard
2016-12-16 15:39             ` Andre Przywara
2016-12-19  8:17               ` Maxime Ripard

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