From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 3/5] rockchip: back-to-bootrom: rk3188: chain from SPL via TPL to the BROM
Date: Sun, 24 Sep 2017 22:12:46 -0400 [thread overview]
Message-ID: <CAPnjgZ3FQ=m=brC8nDX-r+7diU+sURt63yrZ5rVGT4HdZZz4zA@mail.gmail.com> (raw)
In-Reply-To: <1505758708-29213-4-git-send-email-philipp.tomsich@theobroma-systems.com>
On 18 September 2017 at 12:18, Philipp Tomsich
<philipp.tomsich@theobroma-systems.com> wrote:
> The RK3188 implementation previously passed the address of the stack
> frame created during save_boot_params via pmu->os_reg[2]. This was not
> strictly necessary, as the save_boot_params() function was called
> twice (first: for TPL, saving the context for the BROM; next: for SPL,
> saving the context for the TPL) and a back-to-bootrom from the SPL
> would thus return to TPL.
>
> To simplify things, we now assume that the state of the TPL is not
> corrupted during SPL (the binaries are non-overlapping) and that the
> SPL can safely return to TPL using the back-to-bootrom mechanism.
> Consequently, the TPL should expect the SPL to return control and then
> further return to the actual bootrom by performing another
> back-to-bootrom transition.
>
> Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
> ---
>
> Changes in v2:
> - [added in v2] chain back_to_bootrom calls for SPL, first returning
> to the TPL (using the same mechanism) and the to the BROM from the
> TPL
>
> arch/arm/mach-rockchip/rk3188-board-spl.c | 10 ----------
> arch/arm/mach-rockchip/rk3188-board-tpl.c | 17 ++++++++++-------
> 2 files changed, 10 insertions(+), 17 deletions(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
next prev parent reply other threads:[~2017-09-25 2:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-18 18:18 [U-Boot] [PATCH v2 0/5] rockchip: back-to-bootrom: replace assembly-implementation with C-code Philipp Tomsich
2017-09-18 18:18 ` [U-Boot] [PATCH v2 1/5] arm: make save_boot_params_ret prototype visible for AArch64 Philipp Tomsich
2017-09-18 18:18 ` [U-Boot] [PATCH v2 2/5] rockchip: back-to-bootrom: replace assembly-implementation with C-code Philipp Tomsich
2017-09-18 18:18 ` [U-Boot] [PATCH v2 3/5] rockchip: back-to-bootrom: rk3188: chain from SPL via TPL to the BROM Philipp Tomsich
2017-09-25 2:12 ` Simon Glass [this message]
2017-09-18 18:18 ` [U-Boot] [PATCH v2 4/5] rockchip: back-to-bootrom: allow passing a cmd to the bootrom Philipp Tomsich
2017-09-25 2:12 ` Simon Glass
2017-09-18 18:18 ` [U-Boot] [PATCH v2 5/5] rockchip: back-to-bootrom: do not compile bootrom.o in thumb mode Philipp Tomsich
2017-09-19 2:06 ` [U-Boot] [PATCH v2 0/5] rockchip: back-to-bootrom: replace assembly-implementation with C-code Andy Yan
2017-09-19 7:19 ` Andy Yan
2017-09-19 9:10 ` Dr. Philipp Tomsich
2017-09-19 9:12 ` Heiko Stübner
2017-09-19 10:16 ` Dr. Philipp Tomsich
2017-09-21 8:26 ` Dr. Philipp Tomsich
2017-09-21 8:51 ` Heiko Stuebner
2017-09-19 12:45 ` Dr. Philipp Tomsich
2017-09-20 1:51 ` Andy Yan
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