From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 1/4] MIPS: ath79: pbl: import AR9331 CP0 init routine from U-Boot_mod
Date: Thu, 25 Feb 2016 12:14:50 +0300 [thread overview]
Message-ID: <1456391693-25172-2-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1456391693-25172-1-git-send-email-antonynpavlov@gmail.com>
U-Boot_mod is a popular bootloader for Atheros AR93xx chips,
please see https://github.com/pepe2k/u-boot_mod for details.
It's reasonable to import some lowlevel AR9331 initialization
code from U-Boot_mod.
This patch imports AR9331 MIPS24K coprocessor0 initialization
code from u-boot_mod/u-boot/cpu/mips/start_bootstrap.S.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/mach-ath79/include/mach/pbl_macros.h | 44 ++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/arch/mips/mach-ath79/include/mach/pbl_macros.h b/arch/mips/mach-ath79/include/mach/pbl_macros.h
index c00dd28..810f49d 100644
--- a/arch/mips/mach-ath79/include/mach/pbl_macros.h
+++ b/arch/mips/mach-ath79/include/mach/pbl_macros.h
@@ -179,4 +179,48 @@
| AR933X_GPIO_FUNC_RSRV15, GPIO_FUNC
.endm
+.macro hornet_mips24k_cp0_setup
+ .set push
+ .set noreorder
+
+ /*
+ * Clearing CP0 registers - This is generally required for the MIPS-24k
+ * core used by Atheros.
+ */
+ mtc0 zero, CP0_INDEX
+ mtc0 zero, CP0_ENTRYLO0
+ mtc0 zero, CP0_ENTRYLO1
+ mtc0 zero, CP0_CONTEXT
+ mtc0 zero, CP0_PAGEMASK
+ mtc0 zero, CP0_WIRED
+ mtc0 zero, CP0_INFO
+ mtc0 zero, CP0_COUNT
+ mtc0 zero, CP0_ENTRYHI
+ mtc0 zero, CP0_COMPARE
+
+ li t0, ST0_CU0 | ST0_ERL
+ mtc0 t0, CP0_STATUS
+
+ mtc0 zero, CP0_CAUSE
+ mtc0 zero, CP0_EPC
+
+ li t0, CONF_CM_UNCACHED
+ mtc0 t0, CP0_CONFIG
+
+ mtc0 zero, CP0_LLADDR
+ mtc0 zero, CP0_WATCHLO
+ mtc0 zero, CP0_WATCHHI
+ mtc0 zero, CP0_XCONTEXT
+ mtc0 zero, CP0_FRAMEMASK
+ mtc0 zero, CP0_DIAGNOSTIC
+ mtc0 zero, CP0_DEBUG
+ mtc0 zero, CP0_DEPC
+ mtc0 zero, CP0_PERFORMANCE
+ mtc0 zero, CP0_ECC
+ mtc0 zero, CP0_CACHEERR
+ mtc0 zero, CP0_TAGLO
+
+ .set pop
+.endm
+
#endif /* __ASM_MACH_ATH79_PBL_MACROS_H */
--
2.7.0
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next prev parent reply other threads:[~2016-02-25 9:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 9:14 [PATCH 0/4] MIPS: ath79: pbl: use more lowlevel init code " Antony Pavlov
2016-02-25 9:14 ` Antony Pavlov [this message]
2016-02-25 15:23 ` [PATCH 1/4] MIPS: ath79: pbl: import AR9331 CP0 init routine " Yegor Yefremov
2016-02-25 9:14 ` [PATCH 2/4] MIPS: ath79: pbl: import hornet_1_1_war " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-25 9:14 ` [PATCH 3/4] MIPS: tplink-mr3020: pbl: use more lowlevel init code " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-25 9:14 ` [PATCH 4/4] MIPS: black-swift: " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-26 6:51 ` [PATCH 0/4] MIPS: ath79: " Sascha Hauer
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