* [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM
@ 2015-11-11 1:09 Antony Pavlov
2015-11-11 1:09 ` [PATCH 1/3] MIPS: pbl: add pbl_blt macro Antony Pavlov
` (3 more replies)
0 siblings, 4 replies; 7+ messages in thread
From: Antony Pavlov @ 2015-11-11 1:09 UTC (permalink / raw)
To: barebox
Antony Pavlov (2):
MIPS: black-swift: skip pbl lowlevel init if running from RAM
MIPS: tplink-mr3020: skip pbl lowlevel init if running from RAM
Oleksij Rempel (1):
MIPS: pbl: add pbl_blt macro
arch/mips/boards/black-swift/include/board/board_pbl_start.h | 3 +++
.../boards/tplink-mr3020/include/board/board_pbl_start.h | 3 +++
arch/mips/include/asm/pbl_macros.h | 12 ++++++++++++
3 files changed, 18 insertions(+)
--
2.6.2
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 1/3] MIPS: pbl: add pbl_blt macro
2015-11-11 1:09 [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM Antony Pavlov
@ 2015-11-11 1:09 ` Antony Pavlov
2015-11-11 7:41 ` Yegor Yefremov
2015-11-11 1:09 ` [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM Antony Pavlov
` (2 subsequent siblings)
3 siblings, 1 reply; 7+ messages in thread
From: Antony Pavlov @ 2015-11-11 1:09 UTC (permalink / raw)
To: barebox; +Cc: Oleksij Rempel
From: Oleksij Rempel <linux@rempel-privat.de>
Barebox' PBL can initialize memory controller of the board.
But we can use memory controller initialization routine
only if PBL runs from ROM or on-chip SRAM.
MIPS architecture standard boot vector is 0xbfc00000
so on most MIPS SoCs all addresses higher than 0xbfc00000
belong to boot ROM or on-chip SRAM. Well then we have
simple criterion to check if PBL run from ROM: just
check if current PC is higher than 0xbfc00000.
Some MIPS boards have ROM start address lower than 0xbfc00000
so it's reasonable we have to make ROM start address
board dependend.
The pbl_blt macro checks if current pc is lower than
the first argument (ROM start address). If so then
next instruction executed is defined by the second argument
of the macro.
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/include/asm/pbl_macros.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h
index c4ae6a2..dbe3410 100644
--- a/arch/mips/include/asm/pbl_macros.h
+++ b/arch/mips/include/asm/pbl_macros.h
@@ -60,6 +60,18 @@
.set pop
.endm
+ .macro pbl_blt addr label tmp
+ .set push
+ .set noreorder
+ move \tmp, ra # preserve ra beforehand
+ bal 253f
+ nop
+253:
+ bltu ra, \addr, \label
+ move ra, \tmp # restore ra
+ .set pop
+ .endm
+
.macro pbl_sleep reg count
.set push
.set noreorder
--
2.6.2
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM
2015-11-11 1:09 [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM Antony Pavlov
2015-11-11 1:09 ` [PATCH 1/3] MIPS: pbl: add pbl_blt macro Antony Pavlov
@ 2015-11-11 1:09 ` Antony Pavlov
2015-11-11 7:42 ` Yegor Yefremov
2015-11-11 1:09 ` [PATCH 3/3] MIPS: tplink-mr3020: " Antony Pavlov
2015-11-11 8:45 ` [PATCH 0/3] MIPS: ath79: " Antony Pavlov
3 siblings, 1 reply; 7+ messages in thread
From: Antony Pavlov @ 2015-11-11 1:09 UTC (permalink / raw)
To: barebox
Black Swift has 16 MiB flash boot ROM that can be remapped to 0xbf000000.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/boards/black-swift/include/board/board_pbl_start.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/mips/boards/black-swift/include/board/board_pbl_start.h b/arch/mips/boards/black-swift/include/board/board_pbl_start.h
index f78e0d9..7394092 100644
--- a/arch/mips/boards/black-swift/include/board/board_pbl_start.h
+++ b/arch/mips/boards/black-swift/include/board/board_pbl_start.h
@@ -28,9 +28,12 @@
mips_disable_interrupts
+ pbl_blt 0xbf000000 skip_pll_ram_config t8
+
pbl_ar9331_pll
pbl_ar9331_ddr2_config
+skip_pll_ram_config:
pbl_ar9331_uart_enable
debug_ll_ar9331_init
mips_nmon
--
2.6.2
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 3/3] MIPS: tplink-mr3020: skip pbl lowlevel init if running from RAM
2015-11-11 1:09 [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM Antony Pavlov
2015-11-11 1:09 ` [PATCH 1/3] MIPS: pbl: add pbl_blt macro Antony Pavlov
2015-11-11 1:09 ` [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM Antony Pavlov
@ 2015-11-11 1:09 ` Antony Pavlov
2015-11-11 8:45 ` [PATCH 0/3] MIPS: ath79: " Antony Pavlov
3 siblings, 0 replies; 7+ messages in thread
From: Antony Pavlov @ 2015-11-11 1:09 UTC (permalink / raw)
To: barebox
TP-Link MR3020 has 4 MiB flash boot ROM that is mapped to 0xbfc00000.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/boards/tplink-mr3020/include/board/board_pbl_start.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/mips/boards/tplink-mr3020/include/board/board_pbl_start.h b/arch/mips/boards/tplink-mr3020/include/board/board_pbl_start.h
index 08204fe..328426e 100644
--- a/arch/mips/boards/tplink-mr3020/include/board/board_pbl_start.h
+++ b/arch/mips/boards/tplink-mr3020/include/board/board_pbl_start.h
@@ -28,9 +28,12 @@
mips_disable_interrupts
+ pbl_blt 0xbfc00000 skip_pll_ram_config t8
+
pbl_ar9331_pll
pbl_ar9331_ddr1_config
+skip_pll_ram_config:
pbl_ar9331_uart_enable
debug_ll_ar9331_init
mips_nmon
--
2.6.2
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 1/3] MIPS: pbl: add pbl_blt macro
2015-11-11 1:09 ` [PATCH 1/3] MIPS: pbl: add pbl_blt macro Antony Pavlov
@ 2015-11-11 7:41 ` Yegor Yefremov
0 siblings, 0 replies; 7+ messages in thread
From: Yegor Yefremov @ 2015-11-11 7:41 UTC (permalink / raw)
To: Antony Pavlov; +Cc: barebox, Oleksij Rempel
On Wed, Nov 11, 2015 at 2:09 AM, Antony Pavlov <antonynpavlov@gmail.com> wrote:
> From: Oleksij Rempel <linux@rempel-privat.de>
>
> Barebox' PBL can initialize memory controller of the board.
> But we can use memory controller initialization routine
> only if PBL runs from ROM or on-chip SRAM.
> MIPS architecture standard boot vector is 0xbfc00000
> so on most MIPS SoCs all addresses higher than 0xbfc00000
> belong to boot ROM or on-chip SRAM. Well then we have
> simple criterion to check if PBL run from ROM: just
> check if current PC is higher than 0xbfc00000.
> Some MIPS boards have ROM start address lower than 0xbfc00000
> so it's reasonable we have to make ROM start address
> board dependend.
>
> The pbl_blt macro checks if current pc is lower than
> the first argument (ROM start address). If so then
> next instruction executed is defined by the second argument
> of the macro.
>
> Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> ---
> arch/mips/include/asm/pbl_macros.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h
> index c4ae6a2..dbe3410 100644
> --- a/arch/mips/include/asm/pbl_macros.h
> +++ b/arch/mips/include/asm/pbl_macros.h
> @@ -60,6 +60,18 @@
> .set pop
> .endm
>
> + .macro pbl_blt addr label tmp
> + .set push
> + .set noreorder
> + move \tmp, ra # preserve ra beforehand
> + bal 253f
> + nop
> +253:
> + bltu ra, \addr, \label
> + move ra, \tmp # restore ra
> + .set pop
> + .endm
> +
> .macro pbl_sleep reg count
> .set push
> .set noreorder
> --
> 2.6.2
Loaded barebox.bin via OpenOCD and successfully started
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Yegor
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM
2015-11-11 1:09 ` [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM Antony Pavlov
@ 2015-11-11 7:42 ` Yegor Yefremov
0 siblings, 0 replies; 7+ messages in thread
From: Yegor Yefremov @ 2015-11-11 7:42 UTC (permalink / raw)
To: Antony Pavlov; +Cc: barebox
On Wed, Nov 11, 2015 at 2:09 AM, Antony Pavlov <antonynpavlov@gmail.com> wrote:
> Black Swift has 16 MiB flash boot ROM that can be remapped to 0xbf000000.
>
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> ---
> arch/mips/boards/black-swift/include/board/board_pbl_start.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/mips/boards/black-swift/include/board/board_pbl_start.h b/arch/mips/boards/black-swift/include/board/board_pbl_start.h
> index f78e0d9..7394092 100644
> --- a/arch/mips/boards/black-swift/include/board/board_pbl_start.h
> +++ b/arch/mips/boards/black-swift/include/board/board_pbl_start.h
> @@ -28,9 +28,12 @@
>
> mips_disable_interrupts
>
> + pbl_blt 0xbf000000 skip_pll_ram_config t8
> +
> pbl_ar9331_pll
> pbl_ar9331_ddr2_config
>
> +skip_pll_ram_config:
> pbl_ar9331_uart_enable
> debug_ll_ar9331_init
> mips_nmon
> --
> 2.6.2
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM
2015-11-11 1:09 [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM Antony Pavlov
` (2 preceding siblings ...)
2015-11-11 1:09 ` [PATCH 3/3] MIPS: tplink-mr3020: " Antony Pavlov
@ 2015-11-11 8:45 ` Antony Pavlov
3 siblings, 0 replies; 7+ messages in thread
From: Antony Pavlov @ 2015-11-11 8:45 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
On Wed, 11 Nov 2015 04:09:12 +0300
Antony Pavlov <antonynpavlov@gmail.com> wrote:
Hi Sascha!
Please don't apply this patchseries.
I'm working on cosmetic fixes.
I'll send the v2 in a few hours.
> Antony Pavlov (2):
> MIPS: black-swift: skip pbl lowlevel init if running from RAM
> MIPS: tplink-mr3020: skip pbl lowlevel init if running from RAM
>
> Oleksij Rempel (1):
> MIPS: pbl: add pbl_blt macro
>
> arch/mips/boards/black-swift/include/board/board_pbl_start.h | 3 +++
> .../boards/tplink-mr3020/include/board/board_pbl_start.h | 3 +++
> arch/mips/include/asm/pbl_macros.h | 12 ++++++++++++
> 3 files changed, 18 insertions(+)
>
> --
> 2.6.2
>
--
--
Best regards,
Antony Pavlov
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2015-11-11 1:09 [PATCH 0/3] MIPS: ath79: skip pbl lowlevel init if running from RAM Antony Pavlov
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2015-11-11 7:41 ` Yegor Yefremov
2015-11-11 1:09 ` [PATCH 2/3] MIPS: black-swift: skip pbl lowlevel init if running from RAM Antony Pavlov
2015-11-11 7:42 ` Yegor Yefremov
2015-11-11 1:09 ` [PATCH 3/3] MIPS: tplink-mr3020: " Antony Pavlov
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