Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / boot / compressed / head-sharpsl.S

diff --git a/kernel/arch/arm/boot/compressed/head-sharpsl.S b/kernel/arch/arm/boot/compressed/head-sharpsl.S
new file mode 100644 (file)
index 0000000..eb0084e
--- /dev/null
+++ b/kernel/arch/arm/boot/compressed/head-sharpsl.S
@@ -0,0 +1,150 @@
+/*
+ * linux/arch/arm/boot/compressed/head-sharpsl.S
+ *
+ * Copyright (C) 2004-2005 Richard Purdie <rpurdie@rpsys.net>
+ *
+ * Sharp's bootloader doesn't pass any kind of machine ID
+ * so we have to figure out the machine for ourselves...
+ *
+ * Support for Poodle, Corgi (SL-C700), Shepherd (SL-C750)
+ * Husky (SL-C760), Tosa (SL-C6000), Spitz (SL-C3000),
+ * Akita (SL-C1000) and Borzoi (SL-C3100).
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/mach-types.h>
+
+#ifndef CONFIG_PXA_SHARPSL
+#error What am I doing here...
+#endif
+
+               .section        ".start", "ax"
+
+__SharpSL_start:
+
+/* Check for TC6393 - if found we have a Tosa */
+       ldr     r7, .TOSAID
+       mov     r1, #0x10000000         @ Base address of TC6393 chip
+       mov     r6, #0x03
+       ldrh    r3, [r1, #8]            @ Load TC6393XB Revison: This is 0x0003
+       cmp     r6, r3
+       beq     .SHARPEND               @ Success -> tosa
+
+/* Check for pxa270 - if found, branch */
+       mrc p15, 0, r4, c0, c0          @ Get Processor ID
+       and     r4, r4, #0xffffff00
+       ldr     r3, .PXA270ID
+       cmp     r4, r3
+       beq     .PXA270
+
+/* Check for w100 - if not found we have a Poodle */
+       ldr     r1, .W100ADDR           @ Base address of w100 chip + regs offset
+
+       mov r6, #0x31                   @ Load Magic Init value
+       str     r6, [r1, #0x280]        @ to SCRATCH_UMSK
+       mov r5, #0x3000
+.W100LOOP:
+       subs r5, r5, #1
+       bne .W100LOOP
+       mov r6, #0x30                   @ Load 2nd Magic Init value
+       str     r6, [r1, #0x280]        @ to SCRATCH_UMSK
+
+       ldr     r6, [r1, #0]            @ Load Chip ID
+       ldr     r3, .W100ID
+       ldr     r7, .POODLEID
+       cmp     r6, r3
+       bne     .SHARPEND                       @ We have no w100 - Poodle
+
+/* Check for pxa250 - if found we have a Corgi */
+       ldr     r7, .CORGIID
+       ldr     r3, .PXA255ID
+       cmp     r4, r3
+       blo     .SHARPEND                       @ We have a PXA250 - Corgi
+
+/* Check for 64MiB flash - if found we have a Shepherd */
+       bl      get_flash_ids
+       ldr     r7, .SHEPHERDID
+       cmp     r3, #0x76                       @ 64MiB flash
+       beq     .SHARPEND                       @ We have Shepherd
+
+/* Must be a Husky */
+       ldr     r7, .HUSKYID            @ Must be Husky
+       b .SHARPEND
+
+.PXA270:
+/* Check for 16MiB flash - if found we have Spitz */
+       bl      get_flash_ids
+       ldr     r7, .SPITZID
+       cmp     r3, #0x73                       @ 16MiB flash
+       beq     .SHARPEND                       @ We have Spitz
+
+/* Check for a second SCOOP chip - if found we have Borzoi */
+       ldr     r1, .SCOOP2ADDR
+       ldr     r7, .BORZOIID
+       mov     r6, #0x0140
+       strh    r6, [r1]
+       ldrh    r6, [r1]
+       cmp     r6, #0x0140
+       beq     .SHARPEND                       @ We have Borzoi
+
+/* Must be Akita */
+       ldr     r7, .AKITAID
+       b       .SHARPEND                       @ We have Borzoi
+
+.PXA255ID:
+       .word   0x69052d00              @ PXA255 Processor ID
+.PXA270ID:
+       .word   0x69054100              @ PXA270 Processor ID
+.W100ID:
+       .word   0x57411002              @ w100 Chip ID
+.W100ADDR:
+       .word   0x08010000              @ w100 Chip ID Reg Address
+.SCOOP2ADDR:
+       .word   0x08800040
+.POODLEID:
+       .word   MACH_TYPE_POODLE
+.CORGIID:
+       .word   MACH_TYPE_CORGI
+.SHEPHERDID:
+       .word   MACH_TYPE_SHEPHERD
+.HUSKYID:
+       .word   MACH_TYPE_HUSKY
+.TOSAID:
+       .word   MACH_TYPE_TOSA
+.SPITZID:
+       .word   MACH_TYPE_SPITZ
+.AKITAID:
+       .word   MACH_TYPE_AKITA
+.BORZOIID:
+       .word   MACH_TYPE_BORZOI
+
+/*
+ * Return: r2 - NAND Manufacturer ID
+ *         r3 - NAND Chip ID
+ * Corrupts: r1
+ */
+get_flash_ids:
+       mov     r1, #0x0c000000         @ Base address of NAND chip
+       ldrb    r3, [r1, #24]           @ Load FLASHCTL
+       bic     r3, r3, #0x11           @ SET NCE
+       orr     r3, r3, #0x0a           @ SET CLR + FLWP
+       strb    r3, [r1, #24]           @ Save to FLASHCTL
+       mov     r2, #0x90               @ Command "readid"
+       strb    r2, [r1, #20]           @ Save to FLASHIO
+       bic     r3, r3, #2              @ CLR CLE
+       orr     r3, r3, #4              @ SET ALE
+       strb    r3, [r1, #24]           @ Save to FLASHCTL
+       mov     r2, #0                  @ Address 0x00
+       strb    r2, [r1, #20]           @ Save to FLASHIO
+       bic     r3, r3, #4              @ CLR ALE
+       strb    r3, [r1, #24]           @ Save to FLASHCTL
+.fids1:
+       ldrb    r3, [r1, #24]           @ Load FLASHCTL
+       tst     r3, #32                 @ Is chip ready?
+       beq     .fids1
+       ldrb    r2, [r1, #20]           @ NAND Manufacturer ID
+       ldrb    r3, [r1, #20]           @ NAND Chip ID
+       mov     pc, lr
+
+.SHARPEND: