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From: Stefan Roese <sr@denx.de>
To: u-boot@lists.denx.de
Subject: [PATCH v2 01/12] mips: start.S: Add CONFIG_MIPS_INIT_JUMP_OFFSET
Date: Thu, 14 May 2020 11:59:01 +0200	[thread overview]
Message-ID: <20200514095912.14428-2-sr@denx.de> (raw)
In-Reply-To: <20200514095912.14428-1-sr@denx.de>

This Kconfig symbol will be introduced with the base Octeon MIPS support.
Using it, its possible to use a TEXT_BASE address which differs from
the reset PC. And with the earliest function call to mips_sram_init()
the CPU will transfer execution to the actual TEXT_BASE region. So after
returning from this function, all absolute addresses are okay again.

This will be used by the Octeon platform to copy the U-Boot image into
L2 cache and transfer execution to the cache to speed up the execution.

Signed-off-by: Stefan Roese <sr@denx.de>

---

Changes in v2:
- New patch

 arch/mips/cpu/start.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index 6de9a2f362..f601662cd0 100644
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -222,6 +222,10 @@ wr_done:
 #ifdef CONFIG_MIPS_SRAM_INIT
 	/* Initialize the SRAM first */
 	PTR_LA	t9, mips_sram_init
+#ifdef CONFIG_MIPS_INIT_JUMP_OFFSET
+	PTR_SUBU \
+		t9, t9, (CONFIG_SYS_TEXT_BASE - CONFIG_MIPS_INIT_JUMP_OFFSET)
+#endif
 	jalr	t9
 	 nop
 #endif
-- 
2.26.2

  reply	other threads:[~2020-05-14  9:59 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-14  9:59 [PATCH v2 00/12] mips: Add initial Octeon MIPS64 base support Stefan Roese
2020-05-14  9:59 ` Stefan Roese [this message]
2020-05-14  9:59 ` [PATCH v2 02/12] mips: start.S: Don't call mips_cache_reset() on ARCH_OCTEON Stefan Roese
2020-05-14  9:59 ` [PATCH v2 03/12] mips: cache: Allow using CONFIG_MIPS_L2_CACHE without CONFIG_MIPS_CM Stefan Roese
2020-06-05 15:29   ` Daniel Schwierzeck
2020-05-14  9:59 ` [PATCH v2 04/12] mips: cache: Make flush_cache() weak to enable overwrite Stefan Roese
2020-06-05 15:29   ` Daniel Schwierzeck
2020-05-14  9:59 ` [PATCH v2 05/12] mips: time: Only compile the weak get_tbclk() when needed Stefan Roese
2020-06-05 15:29   ` Daniel Schwierzeck
2020-05-14  9:59 ` [PATCH v2 06/12] mips: traps: Set WG bit in EBase register on Octeon Stefan Roese
2020-06-05 15:30   ` Daniel Schwierzeck
2020-05-14  9:59 ` [PATCH v2 07/12] mips: mipsregs.h: Add more register macros for Octeon port Stefan Roese
2020-05-14  9:59 ` [PATCH v2 08/12] mips: mipsregs.h: Sync with linux v5.7.0-rc3 version Stefan Roese
2020-05-14  9:59 ` [PATCH v2 09/12] sysreset: Add Octeon sysreset driver Stefan Roese
2020-05-14  9:59 ` [PATCH v2 10/12] mips: octeon: Initial minimal support for the Marvell Octeon SoC Stefan Roese
2020-06-16 17:42   ` Daniel Schwierzeck
2020-06-19  8:08     ` Stefan Roese
2020-05-14  9:59 ` [PATCH v2 11/12] mips: octeon: dts: Add Octeon 3 cn73xx base dtsi file Stefan Roese
2020-05-14  9:59 ` [PATCH v2 12/12] mips: octeon: Add minimal Octeon 3 EBB7304 EVK support Stefan Roese
2020-06-16 17:35   ` Daniel Schwierzeck
2020-06-19  8:06     ` Stefan Roese
2020-05-26 12:23 ` [PATCH v2 00/12] mips: Add initial Octeon MIPS64 base support Stefan Roese
2020-06-02 10:59   ` Stefan Roese
2020-06-05 15:40     ` Daniel Schwierzeck
2020-06-06  5:25       ` Stefan Roese
2020-06-15  7:49         ` Stefan Roese
2020-06-16 17:27           ` Daniel Schwierzeck
2020-06-19  7:51             ` Stefan Roese

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