All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lubomir Rintel <lkundrak@v3.sk>
To: u-boot@lists.denx.de
Subject: [PATCH RFC 04/20] mips: Don't access CP0_EBASE on JZ47XX
Date: Tue, 17 Nov 2020 22:00:02 +0100	[thread overview]
Message-ID: <20201117210018.751469-5-lkundrak@v3.sk> (raw)
In-Reply-To: <20201117210018.751469-1-lkundrak@v3.sk>

On JZ4730 (and I guess all Ingenic/XBurst cores), the CP0 register 15
doesn't support a selector 1 or, for that matter, any selector and always
behaves as if the selector is zero.

We don't need it anyways, these SoCs have just a single processor core.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
 arch/mips/cpu/start.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index d0c412236dd..1402fa3d176 100644
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -136,6 +136,8 @@ reset:
 #ifdef CONFIG_ARCH_BMIPS
 1:	mfc0	t0, CP0_DIAGNOSTIC, 3
 	and	t0, t0, (1 << 31)
+#elif CONFIG_ARCH_JZ47XX
+1:	and	t0, t0, zero
 #else
 1:	mfc0	t0, CP0_EBASE
 	and	t0, t0, MIPS_EBASE_CPUNUM
-- 
2.28.0

  parent reply	other threads:[~2020-11-17 21:00 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-17 20:59 [PATCH RFC 00/20] MIPS: Add support for JZ4730 and Skytone Alpha 400 Lubomir Rintel
2020-11-17 20:59 ` [PATCH RFC 01/20] config: Remove CONFIG_SYS_ID_EEPROM Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 02/20] mtd: Allow building nand_spl_simple w/o SPL_NAND_ECC Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 03/20] cmd/mac: Don't build unless CONFIG_CMD_MAC is enabled Lubomir Rintel
2020-11-17 22:17   ` Daniel Schwierzeck
2020-11-17 21:00 ` Lubomir Rintel [this message]
2020-11-17 21:00 ` [PATCH RFC 05/20] ns16550: Turn on the UME bit if on ARCH_JZ47XX Lubomir Rintel
2020-11-17 22:29   ` Daniel Schwierzeck
2020-11-18  6:55     ` Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 06/20] clk: Add driver for Ingenic JZ4730 CGU Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 07/20] timer-uclass: Tolerate failure to get clock rate in pre_probe Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 08/20] timer: Add Ingenic JZ4730 timer driver Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 09/20] mmc: Default to JZ47XX_MMC=y on ARCH_JZ47XX Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 10/20] mmc/jz_mmc: Add a JZ4740 compatible string Lubomir Rintel
2020-11-18 13:56   ` Ezequiel Garcia
2020-11-17 21:00 ` [PATCH RFC 11/20] mmc/jz_mmc: Support wp-gpio/cd-gpio Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 12/20] pinctrl: Add Ingenic JZ4730 pin control and GPIO driver Lubomir Rintel
2020-11-17 22:39   ` Daniel Schwierzeck
2020-11-17 21:00 ` [PATCH RFC 13/20] nand: Use correct prototype of board_nand_init() with SPL_NAND_SIMPLE Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 14/20] nand/raw: Add Ingenic JZ4730 NAND flash driver Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 15/20] watchdog: Add Ingenic JZ4730 watchdog timer driver Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 16/20] net: Add Ingenic JZ4730 Ethernet driver Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 17/20] mips: dts: Add Ingenic JZ4730 Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 18/20] mips/mach-jz47xx: Add Ingenic JZ4730 support Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 19/20] mips: dts: Add Skytone Alpha 400 Lubomir Rintel
2020-11-17 21:00 ` [PATCH RFC 20/20] board: " Lubomir Rintel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201117210018.751469-5-lkundrak@v3.sk \
    --to=lkundrak@v3.sk \
    --cc=u-boot@lists.denx.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.