This patchset removes some single-platform compatibility tricks related to DEBUG_LL and, as a result, allows multi_v7_defconfig derived builds to enable DEBUG_LL. Currently the user selected kbuild setting is ignored and the PL01X's DEBUG_LL stub is silently selected instead. This is a pain if your hardware doesn't have this cell, not least because it takes a little time to figure out that kbuild built the wrong code.
Warning:
silentoldconfig on PL011 single platforms will result in DEBUG_LL being directed at ICEDCC rather than PL011. This should only affect silentoldconfig since oldconfig prompts and the defconfigs have been updated to avoid this problem.
Changes since v12: - v11 spuriously missed out changes from v10 and v11 (it was incorrectly derived from v9). All changes have been reinstated after thorough review of the diff between v13 and v11 (many thanks to Aaro Koskinen). - Merged the changes to 8250 related changes to defconfig files into a single patch (Arnd Bergmann).
Changes since v11: - Fixed sort order of Kconfig symbols (review of Russell King) - Reviewed all defconfigs for the selection of DEBUG_UART_NONE. All identified have 8250-based UARTs and are switched to DEBUG_LL_UART_8250 (review of Arnd Bergmann). - Fixed regression in the netx macros (bad setting of \rp and \rv. - Rebased on latest mainline (v3.18-rc1). Note that two patches from v11 were merged upstream and are no longer included here. - Added a trivial fix to the defaults list for DEBUG_UART_PHYS which came to my attention as a merge conflict.
Changes since v10: - Fixed typos in the omap1 config help texts (review of Aaro Koskinen).
Changes since v9: - Removed a spuriously introduced (and unused) config variable from the netx patch (review of Paul Bolle). - Fix netx macro to ensure \rv is correctly initialized. - Rebased on v3.17rc4.
Changes since v8: - Regenerated patch series with --find-renames to properly track code movement.
Changes since v7: - Killed DEBUG_LL_UART_NONE completely and migrated over the four remaining platforms that relied on this (Arnd Bergmann, Russell King). This fixes some problems with oldconfig builds. - Rebased on latest mainline (v3.17rc1).
Changes since v6: - Removed a patch to limit DEBUG_LL_UART_NONE to platforms that support it because it almost time to drop DEBUG_LL_UART_NONE anyway (only four platforms still use it). - Rebased on latest mainline (v3.16rc3).
Changes since v5:
- Shortened the list of platforms that can select DEBUG_LL_UART_NONE (changes Arnd Bergmann) - Rebased on latest mainline (v3.15rc7).
Changes since v4:
- Rebased to latest mainline (and tested again). No functional changes.
Changes since v3:
- Converted from a single patch to a series. - Tested defconfig builds of all impacted platforms.
Changes since v2:
- Switch from def_bool to bool (thanks Russell King)
Changes since v1:
- Remove pointless single platform support (thanks Arnd Bergmann)
Daniel Thompson (9): arm: cnx3xxxx: Remove spurious default for DEBUG_CNS3XXX arm: configs: Enable DEBUG_LL_UART_8250 where needed arm: Remove DEBUG_LL_UART_NONE arm: ks8695: Migrate debug_ll macros to shared directory arm: omap1: Migrate debug_ll macros to use 8250.S arm: netx: Migrate DEBUG_LL macros to shared directory arm: sa1100: Migrate DEBUG_LL macros to shared directory arm: Seperate DEBUG_UART_PHYS from DEBUG_LL on EP93XX arm: Fix DEBUG_LL for multi-platform kernels (without PL01X)
arch/arm/Kconfig.debug | 140 +++++++++++++++++---- arch/arm/configs/iop32x_defconfig | 1 + arch/arm/configs/iop33x_defconfig | 1 + arch/arm/configs/ixp4xx_defconfig | 1 + arch/arm/configs/lpc32xx_defconfig | 1 + arch/arm/configs/mv78xx0_defconfig | 1 + arch/arm/configs/orion5x_defconfig | 1 + arch/arm/configs/rpc_defconfig | 1 + .../mach/debug-macro.S => include/debug/ks8695.S} | 10 +- .../mach/debug-macro.S => include/debug/netx.S} | 22 ++-- .../mach/debug-macro.S => include/debug/sa1100.S} | 41 ++---- arch/arm/mach-omap1/include/mach/debug-macro.S | 101 --------------- 12 files changed, 151 insertions(+), 170 deletions(-) rename arch/arm/{mach-ks8695/include/mach/debug-macro.S => include/debug/ks8695.S} (80%) rename arch/arm/{mach-netx/include/mach/debug-macro.S => include/debug/netx.S} (62%) rename arch/arm/{mach-sa1100/include/mach/debug-macro.S => include/debug/sa1100.S} (39%) delete mode 100644 arch/arm/mach-omap1/include/mach/debug-macro.S
-- 1.9.3
The default value for DEBUG_CNS3XXX appears twice. This patch removes the one with the wrong sort order.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org --- arch/arm/Kconfig.debug | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index d8f6a2ec3d4e..c1a5fa3ec0a7 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1134,7 +1134,6 @@ config DEBUG_UART_PHYS DEBUG_S3C2410_UART2) default 0x78000000 if DEBUG_CNS3XXX default 0x7c0003f8 if FOOTBRIDGE - default 0x78000000 if DEBUG_CNS3XXX default 0x80070000 if DEBUG_IMX23_UART default 0x80074000 if DEBUG_IMX28_UART default 0x80230000 if DEBUG_PICOXCELL_UART
All defconfigs touched by this patch already enable DEBUG_LL and by default DEBUG_LL_UART_NONE will be selected. This causes no issues today because due to some back compatibility magic we eventually need to remove it is not actually honoured. Nevertheless DEBUG_LL_UART_8250 is the right value for these platforms and should be set in the config files.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org --- arch/arm/configs/iop32x_defconfig | 1 + arch/arm/configs/iop33x_defconfig | 1 + arch/arm/configs/ixp4xx_defconfig | 1 + arch/arm/configs/lpc32xx_defconfig | 1 + arch/arm/configs/mv78xx0_defconfig | 1 + arch/arm/configs/orion5x_defconfig | 1 + arch/arm/configs/rpc_defconfig | 1 + 7 files changed, 7 insertions(+)
diff --git a/arch/arm/configs/iop32x_defconfig b/arch/arm/configs/iop32x_defconfig index 4f2ec3ac138e..c3058da631da 100644 --- a/arch/arm/configs/iop32x_defconfig +++ b/arch/arm/configs/iop32x_defconfig @@ -106,6 +106,7 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_KEYS=y CONFIG_KEYS_DEBUG_PROC_KEYS=y CONFIG_CRYPTO_NULL=y diff --git a/arch/arm/configs/iop33x_defconfig b/arch/arm/configs/iop33x_defconfig index aa36128abca2..713faeee8cf4 100644 --- a/arch/arm/configs/iop33x_defconfig +++ b/arch/arm/configs/iop33x_defconfig @@ -87,5 +87,6 @@ CONFIG_DEBUG_KERNEL=y # CONFIG_RCU_CPU_STALL_DETECTOR is not set CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y # CONFIG_CRYPTO_ANSI_CPRNG is not set # CONFIG_CRC32 is not set diff --git a/arch/arm/configs/ixp4xx_defconfig b/arch/arm/configs/ixp4xx_defconfig index 1af665e847d1..24636cfdf6df 100644 --- a/arch/arm/configs/ixp4xx_defconfig +++ b/arch/arm/configs/ixp4xx_defconfig @@ -202,3 +202,4 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y diff --git a/arch/arm/configs/lpc32xx_defconfig b/arch/arm/configs/lpc32xx_defconfig index 9f56ca3985ae..c100b7df5441 100644 --- a/arch/arm/configs/lpc32xx_defconfig +++ b/arch/arm/configs/lpc32xx_defconfig @@ -204,6 +204,7 @@ CONFIG_DEBUG_INFO=y # CONFIG_FTRACE is not set # CONFIG_ARM_UNWIND is not set CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_EARLY_PRINTK=y CONFIG_CRYPTO_ANSI_CPRNG=y # CONFIG_CRYPTO_HW is not set diff --git a/arch/arm/configs/mv78xx0_defconfig b/arch/arm/configs/mv78xx0_defconfig index 0dae1c1f007a..85d10d2e3d66 100644 --- a/arch/arm/configs/mv78xx0_defconfig +++ b/arch/arm/configs/mv78xx0_defconfig @@ -132,6 +132,7 @@ CONFIG_SYSCTL_SYSCALL_CHECK=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_CRYPTO_CBC=m CONFIG_CRYPTO_ECB=m CONFIG_CRYPTO_PCBC=m diff --git a/arch/arm/configs/orion5x_defconfig b/arch/arm/configs/orion5x_defconfig index 952430d9e2d9..855143fac6bd 100644 --- a/arch/arm/configs/orion5x_defconfig +++ b/arch/arm/configs/orion5x_defconfig @@ -156,6 +156,7 @@ CONFIG_LATENCYTOP=y # CONFIG_FTRACE is not set CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_CRYPTO_CBC=m CONFIG_CRYPTO_ECB=m CONFIG_CRYPTO_PCBC=m diff --git a/arch/arm/configs/rpc_defconfig b/arch/arm/configs/rpc_defconfig index 00515ef9782d..89631795a915 100644 --- a/arch/arm/configs/rpc_defconfig +++ b/arch/arm/configs/rpc_defconfig @@ -131,3 +131,4 @@ CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y
Only a very small handful of platforms support DEBUG_LL_UART_NONE but it lurks in the menus of every single platform config ready to break the build. This is an especial problem for defconfig/oldconfig since it is often selected by default.
This patch solves the problem by removing this option. Any platforms still depending upon this option must be migrated.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk --- arch/arm/Kconfig.debug | 9 --------- 1 file changed, 9 deletions(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index c1a5fa3ec0a7..1316c2b9a222 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -909,15 +909,6 @@ choice This option selects UART0 on VIA/Wondermedia System-on-a-chip devices, including VT8500, WM8505, WM8650 and WM8850.
- config DEBUG_LL_UART_NONE - bool "No low-level debugging UART" - depends on !ARCH_MULTIPLATFORM - help - Say Y here if your platform doesn't provide a UART option - above. This relies on your platform choosing the right UART - definition internally in order for low-level debugging to - work. - config DEBUG_ICEDCC bool "Kernel low-level debugging via EmbeddedICE DCC channel" help
As part of the migration a couple of uart definitions have been copied from of the platform specific header files.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk Cc: Greg Ungerer gerg@uclinux.org Cc: Arnd Bergmann arnd.bergmann@linaro.org --- arch/arm/Kconfig.debug | 8 ++++++++ .../include/mach/debug-macro.S => include/debug/ks8695.S} | 10 +++++++--- 2 files changed, 15 insertions(+), 3 deletions(-) rename arch/arm/{mach-ks8695/include/mach/debug-macro.S => include/debug/ks8695.S} (80%)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 1316c2b9a222..6dc39e69fe12 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -365,6 +365,13 @@ choice Say Y here if you want the debug print routines to direct their output to UART1 serial port on KEYSTONE2 devices.
+ config DEBUG_KS8695_UART + bool "KS8695 Debug UART" + depends on ARCH_KS8695 + help + Say Y here if you want kernel low-level debugging support + on KS8695. + config DEBUG_MESON_UARTAO bool "Kernel low-level debugging via Meson6 UARTAO" depends on ARCH_MESON @@ -1050,6 +1057,7 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6Q_UART || \ DEBUG_IMX6SL_UART || \ DEBUG_IMX6SX_UART + default "debug/ks8695.S" if DEBUG_KS8695_UART default "debug/msm.S" if DEBUG_MSM_UART || DEBUG_QCOM_UARTDM default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART default "debug/s3c24xx.S" if DEBUG_S3C24XX_UART diff --git a/arch/arm/mach-ks8695/include/mach/debug-macro.S b/arch/arm/include/debug/ks8695.S similarity index 80% rename from arch/arm/mach-ks8695/include/mach/debug-macro.S rename to arch/arm/include/debug/ks8695.S index a79e48981202..961da1f32ab3 100644 --- a/arch/arm/mach-ks8695/include/mach/debug-macro.S +++ b/arch/arm/include/debug/ks8695.S @@ -1,5 +1,5 @@ /* - * arch/arm/mach-ks8695/include/mach/debug-macro.S + * arch/arm/include/debug/ks8695.S * * Copyright (C) 2006 Ben Dooks ben@simtec.co.uk * Copyright (C) 2006 Simtec Electronics @@ -11,8 +11,12 @@ * published by the Free Software Foundation. */
-#include <mach/hardware.h> -#include <mach/regs-uart.h> +#define KS8695_UART_PA 0x03ffe000 +#define KS8695_UART_VA 0xf00fe000 +#define KS8695_URTH (0x04) +#define KS8695_URLS (0x14) +#define URLS_URTE (1 << 6) +#define URLS_URTHRE (1 << 5)
.macro addruart, rp, rv, tmp ldr \rp, =KS8695_UART_PA @ physical base address
The omap1's debug-macro.S is similar to the generic 8250 code. Compared to the 8520 code the omap1 macro automatically determines what UART to use based on breadcrumbs left by the bootloader and automatically copes with the eccentric register layout on OMAP7XX.
This patch drops both these features and relies instead on the generic 8250 macros:
1. Dropping support for the bootloader breadcrumbs is identical to the way the migration was handled for OMAP2 (see 808b7e07464d...).
2. Support for OMAP7XX still exists but it must be configured by hand (DEBUG_OMAP7XXUART1/2/3) rather than handled at runtime.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk Cc: linux-arm-kernel@lists.infradead.org Cc: Tony Lindgren tony@atomide.com Cc: Arnd Bergmann arnd.bergmann@linaro.org Cc: linux-omap@vger.kernel.org Tested-by: Aaro Koskinen aaro.koskinen@iki.fi --- arch/arm/Kconfig.debug | 57 +++++++++++++- arch/arm/mach-omap1/include/mach/debug-macro.S | 101 ------------------------- 2 files changed, 56 insertions(+), 102 deletions(-) delete mode 100644 arch/arm/mach-omap1/include/mach/debug-macro.S
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 6dc39e69fe12..80e8ac50551e 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -495,6 +495,30 @@ choice Say Y here if you want kernel low-level debugging support on TI-NSPIRE CX models.
+ config DEBUG_OMAP1UART1 + bool "Kernel low-level debugging via OMAP1 UART1" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART1. + + config DEBUG_OMAP1UART2 + bool "Kernel low-level debugging via OMAP1 UART2" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART2. + + config DEBUG_OMAP1UART3 + bool "Kernel low-level debugging via OMAP1 UART3" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART3. + config DEBUG_OMAP2UART1 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)" depends on ARCH_OMAP2PLUS @@ -537,6 +561,30 @@ choice depends on ARCH_OMAP2PLUS select DEBUG_OMAP2PLUS_UART
+ config DEBUG_OMAP7XXUART1 + bool "Kernel low-level debugging via OMAP730 UART1" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART1. + + config DEBUG_OMAP7XXUART2 + bool "Kernel low-level debugging via OMAP730 UART2" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART2. + + config DEBUG_OMAP7XXUART3 + bool "Kernel low-level debugging via OMAP730 UART3" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART3. + config DEBUG_TI81XXUART1 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)" depends on ARCH_OMAP2PLUS @@ -1163,6 +1211,9 @@ config DEBUG_UART_PHYS default 0xffc02000 if DEBUG_SOCFPGA_UART default 0xffd82340 if ARCH_IOP13XX default 0xfff36000 if DEBUG_HIGHBANK_UART + default 0xfffb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1 + default 0xfffb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2 + default 0xfffb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3 default 0xfffe8600 if DEBUG_UART_BCM63XX default 0xfffff700 if ARCH_IOP33X depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ @@ -1236,6 +1287,9 @@ config DEBUG_UART_VIRT default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN default 0xfef36000 if DEBUG_HIGHBANK_UART + default 0xfefb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1 + default 0xfefb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2 + default 0xfefb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3 default 0xfefff700 if ARCH_IOP33X default 0xff003000 if DEBUG_U300_UART default DEBUG_UART_PHYS if !MMU @@ -1247,7 +1301,8 @@ config DEBUG_UART_VIRT config DEBUG_UART_8250_SHIFT int "Register offset shift for the 8250 debug UART" depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 - default 0 if FOOTBRIDGE || ARCH_IOP32X + default 0 if FOOTBRIDGE || ARCH_IOP32X || \ + DEBUG_OMAP7XXUART1 || DEBUG_OMAP7XXUART2 || DEBUG_OMAP7XXUART3 default 2
config DEBUG_UART_8250_WORD diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S deleted file mode 100644 index 5c1a26c9f490..000000000000 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ /dev/null @@ -1,101 +0,0 @@ -/* arch/arm/mach-omap1/include/mach/debug-macro.S - * - * Debugging macro include header - * - * Copyright (C) 1994-1999 Russell King - * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * -*/ - -#include <linux/serial_reg.h> - -#include "serial.h" - - .pushsection .data -omap_uart_phys: .word 0x0 -omap_uart_virt: .word 0x0 - .popsection - - /* - * Note that this code won't work if the bootloader passes - * a wrong machine ID number in r1. To debug, just hardcode - * the desired UART phys and virt addresses temporarily into - * the omap_uart_phys and omap_uart_virt above. - */ - .macro addruart, rp, rv, tmp - - /* Use omap_uart_phys/virt if already configured */ -9: adr \rp, 99f @ get effective addr of 99f - ldr \rv, [\rp] @ get absolute addr of 99f - sub \rv, \rv, \rp @ offset between the two - ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys - sub \tmp, \rp, \rv @ make it effective - ldr \rp, [\tmp, #0] @ omap_uart_phys - ldr \rv, [\tmp, #4] @ omap_uart_virt - cmp \rp, #0 @ is port configured? - cmpne \rv, #0 - bne 100f @ already configured - - /* Check the debug UART configuration set in uncompress.h */ - and \rp, pc, #0xff000000 - ldr \rv, =OMAP_UART_INFO_OFS - ldr \rp, [\rp, \rv] - - /* Select the UART to use based on the UART1 scratchpad value */ -10: cmp \rp, #0 @ no port configured? - beq 11f @ if none, try to use UART1 - cmp \rp, #OMAP1UART1 - beq 11f @ configure OMAP1UART1 - cmp \rp, #OMAP1UART2 - beq 12f @ configure OMAP1UART2 - cmp \rp, #OMAP1UART3 - beq 13f @ configure OMAP2UART3 - - /* Configure the UART offset from the phys/virt base */ -11: mov \rp, #0x00fb0000 @ OMAP1UART1 - b 98f -12: mov \rp, #0x00fb0000 @ OMAP1UART1 - orr \rp, \rp, #0x00000800 @ OMAP1UART2 - b 98f -13: mov \rp, #0x00fb0000 @ OMAP1UART1 - orr \rp, \rp, #0x00000800 @ OMAP1UART2 - orr \rp, \rp, #0x00009000 @ OMAP1UART3 - - /* Store both phys and virt address for the uart */ -98: add \rp, \rp, #0xff000000 @ phys base - str \rp, [\tmp, #0] @ omap_uart_phys - sub \rp, \rp, #0xff000000 @ phys base - add \rp, \rp, #0xfe000000 @ virt base - str \rp, [\tmp, #4] @ omap_uart_virt - b 9b - - .align -99: .word . - .word omap_uart_phys - .ltorg - -100: - .endm - - .macro senduart,rd,rx - strb \rd, [\rx] - .endm - - .macro busyuart,rd,rx -1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)] - and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - beq 1002f - ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)] - and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - bne 1001b -1002: - .endm - - .macro waituart,rd,rx - .endm
* Daniel Thompson daniel.thompson@linaro.org [141117 06:53]:
The omap1's debug-macro.S is similar to the generic 8250 code. Compared to the 8520 code the omap1 macro automatically determines what UART to use based on breadcrumbs left by the bootloader and automatically copes with the eccentric register layout on OMAP7XX.
This patch drops both these features and relies instead on the generic 8250 macros:
Dropping support for the bootloader breadcrumbs is identical to the way the migration was handled for OMAP2 (see 808b7e07464d...).
Support for OMAP7XX still exists but it must be configured by hand (DEBUG_OMAP7XXUART1/2/3) rather than handled at runtime.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk Cc: linux-arm-kernel@lists.infradead.org Cc: Tony Lindgren tony@atomide.com Cc: Arnd Bergmann arnd.bergmann@linaro.org Cc: linux-omap@vger.kernel.org Tested-by: Aaro Koskinen aaro.koskinen@iki.fi
Looks OK to me, probably best that these are queued all together so:
Acked-by: Tony Lindgren tony@atomide.com
As part of the migration we introduce DEBUG_UART_PHYS/DEBUG_UART_VIRT which default to UART1 but allow a user to configure UART2 or UART3. We also introduce symbolic names for the registers and flags.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk Acked-by: Arnd Bergmann arnd.bergmann@linaro.org Cc: linux-arm-kernel@lists.infradead.org --- arch/arm/Kconfig.debug | 16 ++++++++++++++-- .../mach/debug-macro.S => include/debug/netx.S} | 22 +++++++++++----------- 2 files changed, 25 insertions(+), 13 deletions(-) rename arch/arm/{mach-netx/include/mach/debug-macro.S => include/debug/netx.S} (62%)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 80e8ac50551e..3e1a491f6f29 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -471,6 +471,13 @@ choice Say Y here if you want kernel low-level debugging support on Vybrid based platforms.
+ config DEBUG_NETX_UART + bool "Kernel low-level debugging messages via NetX UART" + depends on ARCH_NETX + help + Say Y here if you want kernel low-level debugging support + on Hilscher NetX based platforms. + config DEBUG_NOMADIK_UART bool "Kernel low-level debugging messages via NOMADIK UART" depends on ARCH_NOMADIK @@ -1107,6 +1114,7 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6SX_UART default "debug/ks8695.S" if DEBUG_KS8695_UART default "debug/msm.S" if DEBUG_MSM_UART || DEBUG_QCOM_UARTDM + default "debug/netx.S" if DEBUG_NETX_UART default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART default "debug/s3c24xx.S" if DEBUG_S3C24XX_UART default "debug/s5pv210.S" if DEBUG_S5PV210_UART @@ -1144,6 +1152,7 @@ config DEBUG_UART_BCM63XX
config DEBUG_UART_PHYS hex "Physical base address of debug UART" + default 0x00100a00 if DEBUG_NETX_UART default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0 default 0x01c28000 if DEBUG_SUNXI_UART0 default 0x01c28400 if DEBUG_SUNXI_UART1 @@ -1219,11 +1228,13 @@ config DEBUG_UART_PHYS depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ DEBUG_LL_UART_EFM32 || \ DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ - DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ + DEBUG_MSM_UART || DEBUG_NETX_UART || \ + DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ DEBUG_UART_BCM63XX
config DEBUG_UART_VIRT hex "Virtual base address of debug UART" + default 0xe0000a00 if DEBUG_NETX_UART default 0xe0010fe0 if ARCH_RPC default 0xe1000000 if DEBUG_MSM_UART default 0xf0000be0 if ARCH_EBSA110 @@ -1295,7 +1306,8 @@ config DEBUG_UART_VIRT default DEBUG_UART_PHYS if !MMU depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ - DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ + DEBUG_MSM_UART || DEBUG_NETX_UART || \ + DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ DEBUG_UART_BCM63XX
config DEBUG_UART_8250_SHIFT diff --git a/arch/arm/mach-netx/include/mach/debug-macro.S b/arch/arm/include/debug/netx.S similarity index 62% rename from arch/arm/mach-netx/include/mach/debug-macro.S rename to arch/arm/include/debug/netx.S index 247781e096e2..81e1b2af70f7 100644 --- a/arch/arm/mach-netx/include/mach/debug-macro.S +++ b/arch/arm/include/debug/netx.S @@ -1,5 +1,4 @@ -/* arch/arm/mach-netx/include/mach/debug-macro.S - * +/* * Debugging macro include header * * Copyright (C) 1994-1999 Russell King @@ -11,26 +10,27 @@ * */
-#include "hardware.h" +#define UART_DATA 0 +#define UART_FLAG 0x18 +#define UART_FLAG_BUSY (1 << 3)
.macro addruart, rp, rv, tmp - mov \rp, #0x00000a00 - orr \rv, \rp, #io_p2v(0x00100000) @ virtual - orr \rp, \rp, #0x00100000 @ physical + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT .endm
.macro senduart,rd,rx - str \rd, [\rx, #0] + str \rd, [\rx, #UART_DATA] .endm
.macro busyuart,rd,rx -1002: ldr \rd, [\rx, #0x18] - tst \rd, #(1 << 3) +1002: ldr \rd, [\rx, #UART_FLAG] + tst \rd, #UART_FLAG_BUSY bne 1002b .endm
.macro waituart,rd,rx -1001: ldr \rd, [\rx, #0x18] - tst \rd, #(1 << 3) +1001: ldr \rd, [\rx, #UART_FLAG] + tst \rd, #UART_FLAG_BUSY bne 1001b .endm
As part of the migration we copy a few definitions from the mach-sa1100 headers and replace the automatic serial port detectiion with explicit configuration based on DEBUG_UART_PHYS/DEBUG_UART_VIRT.
The removal of the automatic configuration is similar to the way migration was handled for OMAP2 (see 808b7e07464d...).
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Russell King linux@arm.linux.org.uk --- arch/arm/Kconfig.debug | 39 ++++++++++++++++++-- .../mach/debug-macro.S => include/debug/sa1100.S} | 41 +++++----------------- 2 files changed, 45 insertions(+), 35 deletions(-) rename arch/arm/{mach-sa1100/include/mach/debug-macro.S => include/debug/sa1100.S} (39%)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 3e1a491f6f29..3070498fb637 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -785,6 +785,30 @@ choice their output to UART 2. The port must have been initialised by the boot-loader before use.
+ config DEBUG_SA1100_UART1 + depends on ARCH_SA1100 + select DEBUG_SA1100_UART + bool "Kernel low-level debugging messages via SA1100 Ser1" + help + Say Y here if you want kernel low-level debugging support + on SA1100 based platforms. + + config DEBUG_SA1100_UART2 + depends on ARCH_SA1100 + select DEBUG_SA1100_UART + bool "Kernel low-level debugging messages via SA1100 Ser2" + help + Say Y here if you want kernel low-level debugging support + on SA1100 based platforms. + + config DEBUG_SA1100_UART3 + depends on ARCH_SA1100 + select DEBUG_SA1100_UART + bool "Kernel low-level debugging messages via SA1100 Ser3" + help + Say Y here if you want kernel low-level debugging support + on SA1100 based platforms. + config DEBUG_SOCFPGA_UART depends on ARCH_SOCFPGA bool "Use SOCFPGA UART for low-level debug" @@ -1088,6 +1112,10 @@ config DEBUG_TEGRA_UART bool depends on ARCH_TEGRA
+config DEBUG_SA1100_UART + bool + depends on ARCH_SA1100 + config DEBUG_STI_UART bool depends on ARCH_STI @@ -1118,6 +1146,7 @@ config DEBUG_LL_INCLUDE default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART default "debug/s3c24xx.S" if DEBUG_S3C24XX_UART default "debug/s5pv210.S" if DEBUG_S5PV210_UART + default "debug/sa1100.S" if DEBUG_SA1100_UART default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1 default "debug/sti.S" if DEBUG_STI_UART default "debug/tegra.S" if DEBUG_TEGRA_UART @@ -1190,6 +1219,9 @@ config DEBUG_UART_PHYS DEBUG_S3C2410_UART2) default 0x78000000 if DEBUG_CNS3XXX default 0x7c0003f8 if FOOTBRIDGE + default 0x80010000 if DEBUG_SA1100_UART1 + default 0x80030000 if DEBUG_SA1100_UART2 + default 0x80050000 if DEBUG_SA1100_UART3 default 0x80070000 if DEBUG_IMX23_UART default 0x80074000 if DEBUG_IMX28_UART default 0x80230000 if DEBUG_PICOXCELL_UART @@ -1230,7 +1262,7 @@ config DEBUG_UART_PHYS DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ DEBUG_MSM_UART || DEBUG_NETX_UART || \ DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ - DEBUG_UART_BCM63XX + DEBUG_SA1100_UART || DEBUG_UART_BCM63XX
config DEBUG_UART_VIRT hex "Virtual base address of debug UART" @@ -1259,6 +1291,9 @@ config DEBUG_UART_VIRT default 0xf7fc9000 if DEBUG_BERLIN_UART default 0xf8007000 if DEBUG_HIP04_UART default 0xf8009000 if DEBUG_VEXPRESS_UART0_CA9 + default 0xf8010000 if DEBUG_SA1100_UART1 + default 0xf8030000 if DEBUG_SA1100_UART2 + default 0xf8050000 if DEBUG_SA1100_UART3 default 0xf8090000 if DEBUG_VEXPRESS_UART0_RS1 default 0xfa71e000 if DEBUG_QCOM_UARTDM default 0xfb002000 if DEBUG_CNS3XXX @@ -1308,7 +1343,7 @@ config DEBUG_UART_VIRT DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ DEBUG_MSM_UART || DEBUG_NETX_UART || \ DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ - DEBUG_UART_BCM63XX + DEBUG_SA1100_UART || DEBUG_UART_BCM63XX
config DEBUG_UART_8250_SHIFT int "Register offset shift for the 8250 debug UART" diff --git a/arch/arm/mach-sa1100/include/mach/debug-macro.S b/arch/arm/include/debug/sa1100.S similarity index 39% rename from arch/arm/mach-sa1100/include/mach/debug-macro.S rename to arch/arm/include/debug/sa1100.S index 530772d937ad..6b5e1ce099d3 100644 --- a/arch/arm/mach-sa1100/include/mach/debug-macro.S +++ b/arch/arm/include/debug/sa1100.S @@ -1,5 +1,4 @@ -/* arch/arm/mach-sa1100/include/mach/debug-macro.S - * +/* * Debugging macro include header * * Copyright (C) 1994-1999 Russell King @@ -10,39 +9,15 @@ * published by the Free Software Foundation. * */ -#include <mach/hardware.h> - - .macro addruart, rp, rv, tmp - mrc p15, 0, \rp, c1, c0 - tst \rp, #1 @ MMU enabled? - moveq \rp, #0x80000000 @ physical base address - movne \rp, #0xf8000000 @ virtual address - - @ We probe for the active serial port here, coherently with - @ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h. - @ We assume r1 can be clobbered.
- @ see if Ser3 is active - add \rp, \rp, #0x00050000 - ldr \rv, [\rp, #UTCR3] - tst \rv, #UTCR3_TXE - - @ if Ser3 is inactive, then try Ser1 - addeq \rp, \rp, #(0x00010000 - 0x00050000) - ldreq \rv, [\rp, #UTCR3] - tsteq \rv, #UTCR3_TXE - - @ if Ser1 is inactive, then try Ser2 - addeq \rp, \rp, #(0x00030000 - 0x00010000) - ldreq \rv, [\rp, #UTCR3] - tsteq \rv, #UTCR3_TXE - - @ clear top bits, and generate both phys and virt addresses - lsl \rp, \rp, #8 - lsr \rp, \rp, #8 - orr \rv, \rp, #0xf8000000 @ virtual - orr \rp, \rp, #0x80000000 @ physical +#define UTDR 0x14 +#define UTSR1 0x20 +#define UTSR1_TBY 0x00000001 /* Transmitter BusY (read) */ +#define UTSR1_TNF 0x00000004 /* Transmit FIFO Not Full (read) */
+ .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT .endm
.macro senduart,rd,rx
On EP93XX uncompress.h uses CONFIG_DEBUG_UART_PHYS instead of a hard coded serial port. This means the build breaks when DEBUG_LL (and DEBUG_LL_UART_PL01X) is not enabled.
This is fixed by adding a new dependency.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Acked-by: Arnd Bergmann arnd@arndb.de --- arch/arm/Kconfig.debug | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 3070498fb637..612bdab25f70 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1257,7 +1257,8 @@ config DEBUG_UART_PHYS default 0xfffb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3 default 0xfffe8600 if DEBUG_UART_BCM63XX default 0xfffff700 if ARCH_IOP33X - depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ + depends on ARCH_EP93XX || \ + DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ DEBUG_LL_UART_EFM32 || \ DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ DEBUG_MSM_UART || DEBUG_NETX_UART || \
When building a multi_v7_defconfig kernel it is not possible to configure DEBUG_LL to use any serial device except a ARM Primecell PL01X, or more accurately and worse, it is possible to configure a different serial device but KConfig does not honour this request. In fact this also overrides the user selection for some of the single platform kernels, for example I don't think DEBUG_LL can be targeted at ICE or semihosted supervisor for ARCH_VERSATILE.
This happens because DEBUG_UART_PL01X is automatically enabled by some architectures and this means user decisions made regarding the DEBUG_LL backend will be overridden. Problem is fixed by removing the automatic enabling of this option.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Acked-by: Arnd Bergmann arnd@arndb.de --- arch/arm/Kconfig.debug | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 612bdab25f70..43a5942ed60a 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1160,12 +1160,7 @@ config DEBUG_LL_INCLUDE
# Compatibility options for PL01x config DEBUG_UART_PL01X - def_bool ARCH_EP93XX || \ - ARCH_INTEGRATOR || \ - ARCH_SPEAR3XX || \ - ARCH_SPEAR6XX || \ - ARCH_SPEAR13XX || \ - ARCH_VERSATILE + bool
# Compatibility options for 8250 config DEBUG_UART_8250
linaro-kernel@lists.linaro.org
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Daniel Thompson -
Tony Lindgren