#include <linux/serial_reg.h>
-#include <asm/memory.h>
-
#include <plat/serial.h>
#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
-#define omap_uart_v2p(x) ((x) - PAGE_OFFSET + PLAT_PHYS_OFFSET)
-#define omap_uart_p2v(x) ((x) - PLAT_PHYS_OFFSET + PAGE_OFFSET)
-
.pushsection .data
omap_uart_phys: .word 0
omap_uart_virt: .word 0
* the desired UART phys and virt addresses temporarily into
* the omap_uart_phys and omap_uart_virt above.
*/
- .macro addruart, rp, rv
+ .macro addruart, rp, rv, tmp
/* Use omap_uart_phys/virt if already configured */
-10: mrc p15, 0, \rp, c1, c0
- tst \rp, #1 @ MMU enabled?
- ldreq \rp, =omap_uart_v2p(omap_uart_phys) @ MMU disabled
- ldrne \rp, =omap_uart_phys @ MMU enabled
- add \rv, \rp, #4 @ omap_uart_virt
- ldr \rp, [\rp, #0]
- ldr \rv, [\rv, #0]
+10: 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 99f @ already configured
+ bne 100f @ already configured
/* Check the debug UART configuration set in uncompress.h */
- mrc p15, 0, \rp, c1, c0
- tst \rp, #1 @ MMU enabled?
- ldreq \rp, =OMAP_UART_INFO @ MMU not enabled
- ldrne \rp, =omap_uart_p2v(OMAP_UART_INFO) @ MMU enabled
- ldr \rp, [\rp, #0]
+ mov \rp, pc
+ ldr \rv, =OMAP_UART_INFO_OFS
+ and \rp, \rp, #0xff000000
+ ldr \rp, [\rp, \rv]
/* Select the UART to use based on the UART1 scratchpad value */
cmp \rp, #0 @ no port configured?
b 98f
83: mov \rp, #UART_OFFSET(TI816X_UART3_BASE)
b 98f
+
95: ldr \rp, =ZOOM_UART_BASE
- mrc p15, 0, \rv, c1, c0
- tst \rv, #1 @ MMU enabled?
- ldreq \rv, =omap_uart_v2p(omap_uart_phys) @ MMU disabled
- ldrne \rv, =omap_uart_phys @ MMU enabled
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #0] @ omap_uart_phys
ldr \rp, =ZOOM_UART_VIRT
- add \rv, \rv, #4 @ omap_uart_virt
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #4] @ omap_uart_virt
mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT)
- add \rv, \rv, #4 @ omap_uart_lsr
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #8] @ omap_uart_lsr
b 10b
/* Store both phys and virt address for the uart */
98: add \rp, \rp, #0x48000000 @ phys base
- mrc p15, 0, \rv, c1, c0
- tst \rv, #1 @ MMU enabled?
- ldreq \rv, =omap_uart_v2p(omap_uart_phys) @ MMU disabled
- ldrne \rv, =omap_uart_phys @ MMU enabled
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #0] @ omap_uart_phys
sub \rp, \rp, #0x48000000 @ phys base
add \rp, \rp, #0xfa000000 @ virt base
- add \rv, \rv, #4 @ omap_uart_virt
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #4] @ omap_uart_virt
mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
- add \rv, \rv, #4 @ omap_uart_lsr
- str \rp, [\rv, #0]
+ str \rp, [\tmp, #8] @ omap_uart_lsr
b 10b
-99:
+
+ .align
+99: .word .
+ .word omap_uart_phys
+ .ltorg
+
+100: /* Pass the UART_LSR reg address */
+ ldr \tmp, [\tmp, #8] @ omap_uart_lsr
+ add \rp, \rp, \tmp
+ add \rv, \rv, \tmp
.endm
.macro senduart,rd,rx
- strb \rd, [\rx]
+ orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset
+ bic \rx, \rx, #0xff @ get base (THR) reg address
+ strb \rd, [\rx] @ send lower byte of rd
+ orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR)
+ bic \rd, \rd, #(0xff << 24) @ restore original rd
.endm
.macro busyuart,rd,rx
-1001: mrc p15, 0, \rd, c1, c0
- tst \rd, #1 @ MMU enabled?
- ldreq \rd, =omap_uart_v2p(omap_uart_lsr) @ MMU disabled
- ldrne \rd, =omap_uart_lsr @ MMU enabled
- ldr \rd, [\rd, #0]
- ldrb \rd, [\rx, \rd]
+1001: ldrb \rd, [\rx] @ rx contains UART_LSR address
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
bne 1001b
git.openpandora.org / pandora-kernel.git / blobdiff