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| author | Lars Rasmusson <Lars.Rasmusson@sics.se> | 2013-01-17 16:48:22 +0000 |
|---|---|---|
| committer | Lars Rasmusson <Lars.Rasmusson@sics.se> | 2013-01-17 16:48:22 +0000 |
| commit | 3a55ef6cf7f70c758c7ae9943de14b02f6dac6be (patch) | |
| tree | afb6ad10ebe4363cae4251d8fc26a77186924ae4 /xen | |
| parent | ecdb0c7aecb886ba1ba45eaad9da0ad3dfb119c8 (diff) | |
| download | xen-3a55ef6cf7f70c758c7ae9943de14b02f6dac6be.tar.gz xen-3a55ef6cf7f70c758c7ae9943de14b02f6dac6be.tar.bz2 xen-3a55ef6cf7f70c758c7ae9943de14b02f6dac6be.zip | |
xen: arm: Correct register values and comment in early init_uart.
Set register values and comment in early init_uart to match
documentation of PL011 UART
Reading the PL011 UART documentation on
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0183f/DDI0183.pdf
in sec 3.2 shows the early initialisation of the UART on the Versatile Express
is incorrect. This fixes it.
Signed-off-by: Lars Rasmusson <Lars.Rasmusson@sics.se>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'xen')
| -rw-r--r-- | xen/arch/arm/arm32/head.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S index 4782f1131d..20e9da6228 100644 --- a/xen/arch/arm/arm32/head.S +++ b/xen/arch/arm/arm32/head.S @@ -352,11 +352,11 @@ fail: PRINT("- Boot failed -\r\n") * Clobbers r0-r2 */ init_uart: mov r1, #0x0 - str r1, [r11, #0x24] /* -> UARTIBRD (Baud divisor fraction) */ + str r1, [r11, #0x28] /* -> UARTFBRD (Baud divisor fraction) */ mov r1, #0x4 /* 7.3728MHz / 0x4 == 16 * 115200 */ str r1, [r11, #0x24] /* -> UARTIBRD (Baud divisor integer) */ mov r1, #0x60 /* 8n1 */ - str r1, [r11, #0x24] /* -> UARTLCR_H (Line control) */ + str r1, [r11, #0x2C] /* -> UARTLCR_H (Line control) */ ldr r1, =0x00000301 /* RXE | TXE | UARTEN */ str r1, [r11, #0x30] /* -> UARTCR (Control Register) */ adr r0, 1f |