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arm: return both physical and virtual addresses from addruart

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Rather than checking the MMU status in every instance of addruart, do it
once in kernel/debug.S, and change the existing addruart macros to
return both physical and virtual addresses. The main debug code can then
select the appropriate address to use.

This will also allow us to retreive the address of a uart for the MMU
state that we're not current in.

Updated with fixes for OMAP from Jason Wang <jason77.wang@gmail.com>
and Tony Lindgren <tony@atomide.com>, and fix for versatile express from
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Jeremy Kerr
2010-07-06 18:30:06 +08:00
committed by Nicolas Pitre
parent 1ea6461560
commit 0ea1293009
56 changed files with 440 additions and 454 deletions
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arch/arm/mach-davinci/include/mach/debug-macro.S
+25 -21
View File
@@ -29,35 +29,39 @@ davinci_uart_phys: .word 0
davinci_uart_virt: .word 0
.popsection
.macro addruart, rx, tmp
.macro addruart, rp, rv
/* Use davinci_uart_phys/virt if already configured */
10: mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
ldreq \rx, =__virt_to_phys(davinci_uart_phys)
ldrne \rx, =davinci_uart_virt
ldr \rx, [\rx]
cmp \rx, #0 @ is port configured?
10: mrc p15, 0, \rp, c1, c0
tst \rp, #1 @ MMU enabled?
ldreq \rp, =__virt_to_phys(davinci_uart_phys)
ldrne \rp, =davinci_uart_phys
add \rv, \rp, #4 @ davinci_uart_virt
ldr \rp, [\rp, #0]
ldr \rv, [\rv, #0]
cmp \rp, #0 @ is port configured?
cmpne \rv, #0
bne 99f @ already configured
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
/* Check the debug UART address set in uncompress.h */
mrc p15, 0, \rp, c1, c0
tst \rp, #1 @ MMU enabled?
/* Copy uart phys address from decompressor uart info */
ldreq \tmp, =__virt_to_phys(davinci_uart_phys)
ldrne \tmp, =davinci_uart_phys
ldreq \rx, =DAVINCI_UART_INFO
ldrne \rx, =__phys_to_virt(DAVINCI_UART_INFO)
ldr \rx, [\rx, #0]
str \rx, [\tmp]
ldreq \rv, =__virt_to_phys(davinci_uart_phys)
ldrne \rv, =davinci_uart_phys
ldreq \rp, =DAVINCI_UART_INFO
ldrne \rp, =__phys_to_virt(DAVINCI_UART_INFO)
ldr \rp, [\rp, #0]
str \rp, [\rv]
/* Copy uart virt address from decompressor uart info */
ldreq \tmp, =__virt_to_phys(davinci_uart_virt)
ldrne \tmp, =davinci_uart_virt
ldreq \rx, =DAVINCI_UART_INFO
ldrne \rx, =__phys_to_virt(DAVINCI_UART_INFO)
ldr \rx, [\rx, #4]
str \rx, [\tmp]
ldreq \rv, =__virt_to_phys(davinci_uart_virt)
ldrne \rv, =davinci_uart_virt
ldreq \rp, =DAVINCI_UART_INFO
ldrne \rp, =__phys_to_virt(DAVINCI_UART_INFO)
ldr \rp, [\rp, #4]
str \rp, [\rv]
b 10b
99: