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u-boot/arch/arm/mach-mvebu/lowlevel_spl.S

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
/* SPDX-License-Identifier: GPL-2.0+ */
arm: armada-xp: Add SPL support used to include the DDR training code This patch adds SPL support to the Marvell Armada-XP. With this addition the bin_hdr integration is not needed any more. The SPL will first initialize the serdes/PHY and the call the DDR setup and training code now integrated into mainline U-Boot. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Luka Perkov <luka.perkov@sartura.hr>
2015-01-19 10:33:42 +00:00
#include <config.h>
#include <linux/linkage.h>
ENTRY(save_boot_params)
arm: mvebu: Add option to use UART xmodem protocol via kwboot This patch enables the use of the kwboot tool, to boot mainline U-Boot on the Marvell Armada XP/38x SoC's. This is done by returning to the SoC's BootROM after SPL has initialized the SDRAM. We need to make sure to not reconfigure the internal register space and MBARs. Otherwise the BootROM will not be able to continue after SPL jumps back to it. To use this feature, please don't forget to change the BOOT_FROM line in your board specfic kwbimage.cfg file this way: BOOT_FROM uart Tested on these Marvell eval boards: DB-MV784MP-GP - Armada XP DB-88F6820-GP - Armada 38x Signed-off-by: Stefan Roese <sr@denx.de> Cc: Dirk Eibach <eibach@gdsys.de> Cc: Kevin Smith <kevin.smith@elecsyscorp.com> Cc: Luka Perkov <luka.perkov@sartura.hr>
2015-08-25 11:49:41 +00:00
stmfd sp!, {r0 - r12, lr} /* @ save registers on stack */
ldr r12, =CONFIG_SPL_BOOTROM_SAVE
str sp, [r12]
arm: armada-xp: Fix SPL for AXP by using save_boot_params_ret Patch e11c6c27 (arm: Allow lr to be saved by board code) introduced a different method to return from save_boot_params(). The SPL support for AXP has been pulled and changing to this new method is now required for SPL to work correctly. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Luka Perkov <luka.perkov@sartura.hr>
2015-03-11 11:05:04 +00:00
b save_boot_params_ret
arm: armada-xp: Add SPL support used to include the DDR training code This patch adds SPL support to the Marvell Armada-XP. With this addition the bin_hdr integration is not needed any more. The SPL will first initialize the serdes/PHY and the call the DDR setup and training code now integrated into mainline U-Boot. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Luka Perkov <luka.perkov@sartura.hr>
2015-01-19 10:33:42 +00:00
ENDPROC(save_boot_params)
arm: mvebu: Add option to use UART xmodem protocol via kwboot This patch enables the use of the kwboot tool, to boot mainline U-Boot on the Marvell Armada XP/38x SoC's. This is done by returning to the SoC's BootROM after SPL has initialized the SDRAM. We need to make sure to not reconfigure the internal register space and MBARs. Otherwise the BootROM will not be able to continue after SPL jumps back to it. To use this feature, please don't forget to change the BOOT_FROM line in your board specfic kwbimage.cfg file this way: BOOT_FROM uart Tested on these Marvell eval boards: DB-MV784MP-GP - Armada XP DB-88F6820-GP - Armada 38x Signed-off-by: Stefan Roese <sr@denx.de> Cc: Dirk Eibach <eibach@gdsys.de> Cc: Kevin Smith <kevin.smith@elecsyscorp.com> Cc: Luka Perkov <luka.perkov@sartura.hr>
2015-08-25 11:49:41 +00:00
ENTRY(return_to_bootrom)
ldr r12, =CONFIG_SPL_BOOTROM_SAVE
ldr sp, [r12]
arm: mvebu: Fix return_to_bootrom() Register r0 should be set to return value 0x0 - NO_ERR. Set r0 with return value after all registers are restored from the stack, so that the return value is always correct. Signed-off-by: Pali Rohár <pali@kernel.org> Fixes: 944c7a317675 ("arm: mvebu: Add option to use UART xmodem protocol via kwboot") Reviewed-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Chris Packham <judge.packham@gmail.com> Tested-by: Chris Packham <judge.packham@gmail.com>
2021-07-23 09:14:23 +00:00
ldmfd sp!, {r0 - r12, lr} /* @ restore registers from stack */
arm: mvebu: Add option to use UART xmodem protocol via kwboot This patch enables the use of the kwboot tool, to boot mainline U-Boot on the Marvell Armada XP/38x SoC's. This is done by returning to the SoC's BootROM after SPL has initialized the SDRAM. We need to make sure to not reconfigure the internal register space and MBARs. Otherwise the BootROM will not be able to continue after SPL jumps back to it. To use this feature, please don't forget to change the BOOT_FROM line in your board specfic kwbimage.cfg file this way: BOOT_FROM uart Tested on these Marvell eval boards: DB-MV784MP-GP - Armada XP DB-88F6820-GP - Armada 38x Signed-off-by: Stefan Roese <sr@denx.de> Cc: Dirk Eibach <eibach@gdsys.de> Cc: Kevin Smith <kevin.smith@elecsyscorp.com> Cc: Luka Perkov <luka.perkov@sartura.hr>
2015-08-25 11:49:41 +00:00
mov r0, #0x0 /* @ return value: 0x0 NO_ERR */
arm: mvebu: Fix return_to_bootrom() Register r0 should be set to return value 0x0 - NO_ERR. Set r0 with return value after all registers are restored from the stack, so that the return value is always correct. Signed-off-by: Pali Rohár <pali@kernel.org> Fixes: 944c7a317675 ("arm: mvebu: Add option to use UART xmodem protocol via kwboot") Reviewed-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Chris Packham <judge.packham@gmail.com> Tested-by: Chris Packham <judge.packham@gmail.com>
2021-07-23 09:14:23 +00:00
bx lr /* @ return to bootrom */
arm: mvebu: Add option to use UART xmodem protocol via kwboot This patch enables the use of the kwboot tool, to boot mainline U-Boot on the Marvell Armada XP/38x SoC's. This is done by returning to the SoC's BootROM after SPL has initialized the SDRAM. We need to make sure to not reconfigure the internal register space and MBARs. Otherwise the BootROM will not be able to continue after SPL jumps back to it. To use this feature, please don't forget to change the BOOT_FROM line in your board specfic kwbimage.cfg file this way: BOOT_FROM uart Tested on these Marvell eval boards: DB-MV784MP-GP - Armada XP DB-88F6820-GP - Armada 38x Signed-off-by: Stefan Roese <sr@denx.de> Cc: Dirk Eibach <eibach@gdsys.de> Cc: Kevin Smith <kevin.smith@elecsyscorp.com> Cc: Luka Perkov <luka.perkov@sartura.hr>
2015-08-25 11:49:41 +00:00
ENDPROC(return_to_bootrom)
arm: armada-xp: Add SPL support used to include the DDR training code This patch adds SPL support to the Marvell Armada-XP. With this addition the bin_hdr integration is not needed any more. The SPL will first initialize the serdes/PHY and the call the DDR setup and training code now integrated into mainline U-Boot. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Luka Perkov <luka.perkov@sartura.hr>
2015-01-19 10:33:42 +00:00
/*
* cache_inv - invalidate Cache line
* r0 - dest
*/
.global cache_inv
.type cache_inv, %function
cache_inv:
stmfd sp!, {r1-r12}
mcr p15, 0, r0, c7, c6, 1
ldmfd sp!, {r1-r12}
bx lr
/*
* flush_l1_v6 - l1 cache clean invalidate
* r0 - dest
*/
.global flush_l1_v6
.type flush_l1_v6, %function
flush_l1_v6:
stmfd sp!, {r1-r12}
mcr p15, 0, r0, c7, c10, 5 /* @ data memory barrier */
mcr p15, 0, r0, c7, c14, 1 /* @ clean & invalidate D line */
mcr p15, 0, r0, c7, c10, 4 /* @ data sync barrier */
ldmfd sp!, {r1-r12}
bx lr
/*
* flush_l1_v7 - l1 cache clean invalidate
* r0 - dest
*/
.global flush_l1_v7
.type flush_l1_v7, %function
flush_l1_v7:
stmfd sp!, {r1-r12}
dmb /* @data memory barrier */
mcr p15, 0, r0, c7, c14, 1 /* @ clean & invalidate D line */
dsb /* @data sync barrier */
ldmfd sp!, {r1-r12}
bx lr
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