diff options
Diffstat (limited to 'packages/linux/gumstix-kernel-2.6.21/bkpxa-pxa-cpu.patch')
| -rw-r--r-- | packages/linux/gumstix-kernel-2.6.21/bkpxa-pxa-cpu.patch | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/packages/linux/gumstix-kernel-2.6.21/bkpxa-pxa-cpu.patch b/packages/linux/gumstix-kernel-2.6.21/bkpxa-pxa-cpu.patch new file mode 100644 index 0000000000..6621fd0f51 --- /dev/null +++ b/packages/linux/gumstix-kernel-2.6.21/bkpxa-pxa-cpu.patch @@ -0,0 +1,117 @@ +Status: WORKS +PXA CPU enhancements + +from patch 1667: +- 64K PTEs +from hh.org-cvs: +- support in pxa_gpio_mode for active low + +# +# Patch managed by http://www.mn-logistik.de/unsupported/pxa250/patcher +# + +Index: linux-2.6.21gum/arch/arm/mm/proc-xscale.S +=================================================================== +--- linux-2.6.21gum.orig/arch/arm/mm/proc-xscale.S ++++ linux-2.6.21gum/arch/arm/mm/proc-xscale.S +@@ -474,11 +474,62 @@ ENTRY(cpu_xscale_set_pte_ext) + movne r2, #0 @ no -> fault + + str r2, [r0] @ hardware version ++ ++ @ We try to map 64K page entries when possible. ++ @ We do that for kernel space only since the usage pattern from ++ @ the setting of VM area is quite simple. User space is not worth ++ @ the implied complexity because of ever randomly changing PTEs ++ @ (page aging, swapout, etc) requiring constant coherency checks. ++ @ Since PTEs are usually set in increasing order, we test the ++ @ possibility for a large page only when given the last PTE of a ++ @ 64K boundary. ++ tsteq r1, #L_PTE_USER ++ andeq r1, r0, #(15 << 2) ++ teqeq r1, #(15 << 2) ++ beq 1f ++ + mov ip, #0 + mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line + mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer + mov pc, lr + ++ @ See if we have 16 identical PTEs but with consecutive base addresses ++1: bic r3, r2, #0x0000f000 ++ mov r1, #0x0000f000 ++2: eor r2, r2, r3 ++ teq r2, r1 ++ bne 4f ++ subs r1, r1, #0x00001000 ++ ldr r2, [r0, #-4]! ++ bne 2b ++ eors r2, r2, r3 ++ bne 4f ++ ++ @ Now create our LARGE PTE from the current EXT one. ++ bic r3, r3, #PTE_TYPE_MASK ++ orr r3, r3, #PTE_TYPE_LARGE ++ and r2, r3, #0x30 @ EXT_AP --> LARGE_AP0 ++ orr r2, r2, r2, lsl #2 @ add LARGE_AP1 ++ orr r2, r2, r2, lsl #4 @ add LARGE_AP3 + LARGE_AP2 ++ and r1, r3, #0x3c0 @ EXT_TEX ++ bic r3, r3, #0x3c0 ++ orr r2, r2, r1, lsl #(12 - 6) @ --> LARGE_TEX ++ orr r2, r2, r3 @ add remaining bits ++ ++ @ then put it in the pagetable ++ mov r3, r2 ++3: strd r2, [r0], #8 ++ tst r0, #(15 << 2) ++ bne 3b ++ ++ @ Then sync the 2 corresponding cache lines ++ sub r0, r0, #(16 << 2) ++ mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line ++4: orr r0, r0, #(15 << 2) ++ mcr p15, 0, r0, c7, c10, 1 @ Clean D cache line ++ mov ip, #0 ++ mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer ++ mov pc, lr + + .ltorg + +Index: linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h +=================================================================== +--- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/pxa-regs.h ++++ linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h +@@ -1345,6 +1345,7 @@ + #define GPIO_ALT_FN_2_OUT 0x280 + #define GPIO_ALT_FN_3_IN 0x300 + #define GPIO_ALT_FN_3_OUT 0x380 ++#define GPIO_ACTIVE_LOW 0x1000 + #define GPIO_MD_MASK_NR 0x07f + #define GPIO_MD_MASK_DIR 0x080 + #define GPIO_MD_MASK_FN 0x300 +@@ -1597,6 +1598,25 @@ + #define PWER_GPIO15 PWER_GPIO (15) /* GPIO [15] wake-up enable */ + #define PWER_RTC 0x80000000 /* RTC alarm wake-up enable */ + ++#define PWER_GPIO(Nb) (1 << Nb) /* GPIO [0..15] wake-up enable */ ++#define PWER_GPIO0 PWER_GPIO (0) /* GPIO [0] wake-up enable */ ++#define PWER_GPIO1 PWER_GPIO (1) /* GPIO [1] wake-up enable */ ++#define PWER_GPIO2 PWER_GPIO (2) /* GPIO [2] wake-up enable */ ++#define PWER_GPIO3 PWER_GPIO (3) /* GPIO [3] wake-up enable */ ++#define PWER_GPIO4 PWER_GPIO (4) /* GPIO [4] wake-up enable */ ++#define PWER_GPIO5 PWER_GPIO (5) /* GPIO [5] wake-up enable */ ++#define PWER_GPIO6 PWER_GPIO (6) /* GPIO [6] wake-up enable */ ++#define PWER_GPIO7 PWER_GPIO (7) /* GPIO [7] wake-up enable */ ++#define PWER_GPIO8 PWER_GPIO (8) /* GPIO [8] wake-up enable */ ++#define PWER_GPIO9 PWER_GPIO (9) /* GPIO [9] wake-up enable */ ++#define PWER_GPIO10 PWER_GPIO (10) /* GPIO [10] wake-up enable */ ++#define PWER_GPIO11 PWER_GPIO (11) /* GPIO [11] wake-up enable */ ++#define PWER_GPIO12 PWER_GPIO (12) /* GPIO [12] wake-up enable */ ++#define PWER_GPIO13 PWER_GPIO (13) /* GPIO [13] wake-up enable */ ++#define PWER_GPIO14 PWER_GPIO (14) /* GPIO [14] wake-up enable */ ++#define PWER_GPIO15 PWER_GPIO (15) /* GPIO [15] wake-up enable */ ++#define PWER_RTC 0x80000000 /* RTC alarm wake-up enable */ ++ + + /* + * SSP Serial Port Registers |