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| author | Antony Pavlov <antonynpavlov@gmail.com> | 2016-02-25 12:14:50 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-02-26 07:50:42 +0100 |
| commit | 8dc07d47928783b6517bbb62f16baf3d42006c9e (patch) | |
| tree | dfabb8a5c89d382d7158460b6d06ed14c4520585 /arch/mips/mach-ath79 | |
| parent | f36700bc6c650bc8535fdb8c155d9b730af5d147 (diff) | |
| download | barebox-8dc07d47928783b6517bbb62f16baf3d42006c9e.tar.gz barebox-8dc07d47928783b6517bbb62f16baf3d42006c9e.tar.xz | |
MIPS: ath79: pbl: import AR9331 CP0 init routine from U-Boot_mod
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>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/mips/mach-ath79')
| -rw-r--r-- | arch/mips/mach-ath79/include/mach/pbl_macros.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/mips/mach-ath79/include/mach/pbl_macros.h b/arch/mips/mach-ath79/include/mach/pbl_macros.h index c00dd28f5a..810f49d860 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 */ |