callout_interrupt_atlasii.s

Centrality Atlas II development software

CALLOUT_END(interrupt_unmask_atlasii_cam_i2c)

/*
 * -----------------------------------------------------------------------
 * Identify interrupt source.
 *
 * Returns interrupt number in r4
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_id_atlasii_usp4_7, 0, interrupt_patch)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    /*
     * Read pending IRQ interrupts
     */
    ldr     	r1, [ip, #0x38]    //INT_PEND_EXT
    mov	r1, r1, lsr #8
    ldr      r2, [ip, #0x2C]  //INT_RISC_MASK_EXT
    mov	r2, r2, lsr #8
    and     r1, r1, r2

    cmp                r1, #0
    beq                1f                /* glitch */

    mov     r4, #4
    mov     r2, #1

    /*
     * Scan for first set bit start from bit 16
     */
0:  subs    r4, r4, #1
    blt     1f
    tst     r1, r2, lsl r4
    beq     0b

    /*
     * Mask the interrupt
     */
    ldr     r1, [ip, #0x2C]  //INT_RISC_MASK_EXT
    add	r4, r4, #8
    bic     r1, r1, r2, lsl r4
    str     r1, [ip, #0x2C]  //INT_RISC_MASK_EXT
    subs  r4, r4, #8
   b	2f
1:
	mov r4, #-1
2:
CALLOUT_END(interrupt_id_atlasii_usp4_7)


/*
 * -----------------------------------------------------------------------
 * Acknowledge specified interrupt
 *
 * On entry:
 *	r4 contains the interrupt number
 *	r7 contains the interrupt mask count
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_eoi_atlasii_usp4_7, 0, interrupt_patch)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    /*
     * Only unmask interrupt if mask count is zero
     */

    teq     r7, #0
    bne     0f

    mov		r2, #1
    add		r4, r4, #8

    ldr     r1, [ip, #0x2C]  //INT_RISC_MASK_EXT
    orr     r1, r1, r2, lsl r4
    str     r1, [ip, #0x2C]  //INT_RISC_MASK_EXT
0:

CALLOUT_END(interrupt_eoi_atlasii_usp4_7)


/*
 * -----------------------------------------------------------------------
 * Mask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_mask_atlasii_usp4_7, 0, interrupt_patch)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1
    /*
     * Mask the interrupt
     */
    add	r1, r1, #8
    ldr     r0, [ip, #0x2C]  //INT_RISC_MASK_EXT
    mov     r2, r2, lsl r1
    bic     r0, r0, r2
    str     r0, [ip, #0x2C]  //INT_RISC_MASK_EXT

    mov     r0, #0
    mov     pc, lr
CALLOUT_END(interrupt_mask_atlasii_usp4_7)


/*
 * -----------------------------------------------------------------------
 * Unmask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_unmask_atlasii_usp4_7, 0, interrupt_patch)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1

    /*
     * Unmask the interrupt
     */
    add	r1, r1, #8
    ldr     r0, [ip, #0x2C]  //INT_RISC_MASK_EXT
    orr     r0, r0, r2, lsl r1
    str     r0, [ip, #0x2C]  //INT_RISC_MASK_EXT

	mov		r0, #0
	mov		pc, lr
CALLOUT_END(interrupt_unmask_atlasii_usp4_7)

/*
 * -----------------------------------------------------------------------
 * Routine to patch dma callout code
 *
 * On entry:
 *	r0 - physical address of syspage
 *	r1 - virtual  address of syspage
 *	r2 - offset from start of syspage to start of the callout routine
 *	r3 - offset from start of syspage to read/write data used by callout
 * -----------------------------------------------------------------------
 */

interrupt_patch_dma:
	stmdb	sp!,{r4,lr}
	add		r4, r0, r2					// address of callout routine

	/*
	 * Map interrupt controller registers
	 */
	mov		r0, #0x120	// size of interrupt registers
	ldr		r1, Lintr2_base
	bl		callout_io_map

	/*
	 * Patch the callout routine
	 */
	CALLOUT_PATCH	r4, r0, r1, r2, ip
	ldmia	sp!,{r4,pc}

Lintr2_base:	.word	_DMA_MODULE_BASE 


/*
 * -----------------------------------------------------------------------
 * Identify interrupt source.
 *
 * Returns interrupt number in r4
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_id_atlasii_dma, 0, interrupt_patch_dma)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

      mov                r4, #-1

    /*
     * Read pending IRQ interrupts
     */
    ldr     r1, [ip, #0x114]    //DMA_CHN_INT
    ldr                r2, [ip, #0x118]  //DMA_INT_EN
    and                r1, r1, r2

    cmp                r1, #0
    beq                1f                /* glitch */

    mov     r4, #12
    mov     r2, #1

    /*
     * Scan for first set bit
     */
0:  subs    r4, r4, #1
    blt     1f
    tst     r1, r2, lsl r4
    beq     0b

    /*
     * Clear the interrupt source
     */
    ldr     r1, [ip, #0x114]    //DMA_CHN_INT
    orr     r1, r1, r2, lsl r4
    str     r1, [ip, #0x114]    //DMA_CHN_INT

    /*
     * Mask the interrupt
     */
    ldr     r1, [ip, #0x118]  //DMA_INT_EN
    bic     r1, r1, r2, lsl r4
    str     r1, [ip, #0x118]  //DMA_INT_EN


1:

CALLOUT_END(interrupt_id_atlasii_dma)


/*
 * -----------------------------------------------------------------------
 * Acknowledge specified interrupt
 *
 * On entry:
 *	r4 contains the interrupt number
 *	r7 contains the interrupt mask count
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_eoi_atlasii_dma, 0, interrupt_patch_dma)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    /*
     * Only unmask interrupt if mask count is zero
     */

    teq     r7, #0
    bne     0f

    mov		r2, #1
    mov		r2, r2, lsl r4	

    ldr     r1, [ip, #0x118]  //DMA_INT_EN
    orr     r1, r1, r2
    str     r1, [ip, #0x118]  //DMA_INT_EN

0:

CALLOUT_END(interrupt_eoi_atlasii_dma)


/*
 * -----------------------------------------------------------------------
 * Mask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_mask_atlasii_dma, 0, interrupt_patch_dma)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1
    /*
     * Mask the interrupt
     */
    ldr     r0, [ip, #0x118]  //DMA_INT_EN
    mov     r2, r2, lsl r1
    bic     r0, r0, r2
    str     r0, [ip, #0x118]  //DMA_INT_EN

    mov     r0, #0
    mov     pc, lr
CALLOUT_END(interrupt_mask_atlasii_dma)


/*
 * -----------------------------------------------------------------------
 * Unmask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_unmask_atlasii_dma, 0, interrupt_patch_dma)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1

    /*
     * Unmask the interrupt
     */
    ldr     r0, [ip, #0x118]  //DMA_INT_EN
    orr     r0, r0, r2, lsl r1
    str     r0, [ip, #0x118]  //DMA_INT_EN

	mov		r0, #0
	mov		pc, lr
CALLOUT_END(interrupt_unmask_atlasii_dma)


/*
 * -----------------------------------------------------------------------
 * Routine to patch GPIO group0 callout code
 *
 * On entry:
 *	r0 - physical address of syspage
 *	r1 - virtual  address of syspage
 *	r2 - offset from start of syspage to start of the callout routine
 *	r3 - offset from start of syspage to read/write data used by callout
 * -----------------------------------------------------------------------
 */

interrupt_patch_gpio0:
	stmdb	sp!,{r4,lr}
	add		r4, r0, r2					// address of callout routine

	/*
	 * Map interrupt controller registers
	 */
	mov		r0, #0x90	// size of interrupt registers
	ldr		r1, Lintr3_base
	bl		callout_io_map

	/*
	 * Patch the callout routine
	 */
	CALLOUT_PATCH	r4, r0, r1, r2, ip
	ldmia	sp!,{r4,pc}

Lintr3_base:	.word	_GPIO_MODULE_BASE 


/*
 * -----------------------------------------------------------------------
 * Identify interrupt source.
 *
 * Returns interrupt number in r4
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_id_atlasii_gpio0, 0, interrupt_patch_gpio0)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    /*
     * Read pending IRQ interrupts
     */
    ldr     r1, [ip, #0x8c]    //GPIO group0 Int sts
    mov     r4, #32
    mov     r2, #1
    /*
     * Scan for first set bit
     */
0:  subs    r4, r4, #1
    blt     1f      //no bit set
    tst     r1, r2, lsl r4
    beq     0b

    /* test see if this bit is enabled */
    mov		   r3, r4, lsl #2
    ldr                r1, [ip, r3]  //GPIOx ctrl reg
    tst                r1, r2, lsl #3    //Int_enable bit
    beq                1f                /* glitch */

    /*
     * Clear the interrupt source
     */
    orr     r1, r1, r2, lsl #4   //int sts bit clear
    #str     r1, [ip, r3]  //GPIOx ctrl reg
    	/*
	* Mask the interrupt
     	*/
#    ldr                r1, [ip, r3]  //GPIOx ctrl reg
    bic     r1, r1, r2, lsl #3  //Int_enable bit
    str     r1, [ip, r3]  //GPIOx ctrl reg
    b		2f
1:
    mov r4, #-1
2:
CALLOUT_END(interrupt_id_atlasii_gpio0)


/*
 * -----------------------------------------------------------------------
 * Acknowledge specified interrupt
 *
 * On entry:
 *	r4 contains the interrupt number
 *	r7 contains the interrupt mask count
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_eoi_atlasii_gpio0, 0, interrupt_patch_gpio0)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    /*
     * Only unmask interrupt if mask count is zero
     */

    teq     r7, #0
    bne     0f

    mov		r2, #1
    mov		r3, r4, lsl #2
    ldr             r1, [ip, r3]  //GPIOx ctrl reg
    orr     		r1, r1, r2, lsl #3  //Int_enable bit
    str     		r1, [ip, r3]  //GPIOx ctrl reg

0:

CALLOUT_END(interrupt_eoi_atlasii_gpio0)


/*
 * -----------------------------------------------------------------------
 * Mask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_mask_atlasii_gpio0, 0, interrupt_patch_gpio0)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1
    /*
     * Mask the interrupt
     */
    mov		r3, r1, lsl #2
    ldr             r1, [ip, r3]  //GPIOx ctrl reg
    bic     		r1, r1, r2, lsl #3  //Int_enable bit
    str     		r1, [ip, r3]  //GPIOx ctrl reg

    mov     r0, #0
    mov     pc, lr
CALLOUT_END(interrupt_mask_atlasii_gpio0)


/*
 * -----------------------------------------------------------------------
 * Unmask specified interrupt
 *
 * On entry:
 *	r0 - syspage_ptr
 *	r1 - interrupt number
 *
 * Returns:
 *	r0 - error status
 * -----------------------------------------------------------------------
 */
CALLOUT_START(interrupt_unmask_atlasii_gpio0, 0, interrupt_patch_gpio0)
	/*
	 * Get the interrupt controller base address (patched)
	 */
	mov		ip,     #0x000000ff
	orr		ip, ip, #0x0000ff00
	orr		ip, ip, #0x00ff0000
	orr		ip, ip, #0xff000000

    mov     r2, #1

    /*
     * Unmask the interrupt
     */
     mov		r3, r1, lsl #2
     ldr             r1, [ip, r3]  //GPIOx ctrl reg
    orr     		r1, r1, r2, lsl #3  //Int_enable bit
    str     		r1, [ip, r3]  //GPIOx ctrl reg

	mov		r0, #0
	mov		pc, lr
CALLOUT_END(interrupt_unmask_atlasii_gpio0)