URL https://opencores.org/ocsvn/amber/amber/trunk

Subversion Repositories amber

[/] [amber/] [trunk/] [sw/] [boot-loader-ethmac/] [start.S] - Diff between revs 61 and 78

Go to most recent revision | Show entire file | Details | Blame | View Log

Rev 61	Rev 78
Line 190...	Line 190...
`mov r0, #0`	`mov r0, #0`
`mov pc, r4`	`mov pc, r4`


`service_irq:`	`service_irq:`
`@ Save all registers to the stack`	`@ As this is an interrupt, need tp save all registers to the stack`
`stmfd sp!, {r0-r12, lr}`	`stmfd sp!, {r0-r3, lr}`

`@ is it a timer interrupt ?`	`@ is it a timer interrupt ?`
`ldr r0, AdrInterruptStatus`	`ldr r0, AdrInterruptStatus`
`ldr r1, [r0]`	`ldr r3, [r0]`
`ands r2, r1, #0x20`	`ands r2, r3, #0x20`
`beq 1f @ not timer int, jump`	`beq 1f @ not timer int, jump`
	`@ Remember that registers r0 to r2 can be changed by this function`
`.extern timer_interrupt`	`.extern timer_interrupt`
`bl timer_interrupt`	`bl timer_interrupt`

`@ is it an ethernet interrupt ?`	`@ is it an ethernet interrupt ?`
`1: ands r2, r1, #0x100`	`1: ands r2, r3, #0x100`
`beq 2f @ not ethmac int, jump`	`beq 2f @ not ethmac int, jump`
`.extern ethmac_interrupt`	`.extern ethmac_interrupt`
	`@ Remember that registers r0 to r2 can be changed by this function`
`bl ethmac_interrupt`	`bl ethmac_interrupt`


`2: @ Restore all registers from the stack`	`2: @ Restore all registers from the stack`
`ldmfd sp!, {r0-r12, lr}`	`ldmfd sp!, {r0-r3, lr}`

`@ Jump straight back to normal execution`	`@ Jump straight back to normal execution`
`subs pc, lr, #4`	`subs pc, lr, #4`


Line 460...	Line 462...
`str r2, [r1]`	`str r2, [r1]`

`mov pc, lr`	`mov pc, lr`


	`.global serial_putchar_`
	`serial_putchar_:`
	`ldr r1, AdrUARTDR`
	`ldr r3, AdrUARTFR`
	`@ Check the tx_full flag`
	`1: ldr r2, [r3]`
	`and r2, r2, #0x20`
	`cmp r2, #0`
	`streqb r0, [r1]`
	`moveqs pc, lr @ return`
	`bne 1b`


`/* stack at top of ddr3 memory space */`	`/* stack at top of ddr3 memory space */`
`AdrJumpPoint: .word _jump_point`	`AdrJumpPoint: .word _jump_point`
`AdrExecBase: .word ADR_EXEC_BASE`	`AdrExecBase: .word ADR_EXEC_BASE`
`AdrStack: .word ADR_STACK`	`AdrStack: .word ADR_STACK`
`AdrIRQStack: .word ADR_IRQ_STACK`	`AdrIRQStack: .word ADR_IRQ_STACK`
Line 473...	Line 488...

`AdrMemCtrl: .word ADR_AMBER_TEST_MEM_CTRL`	`AdrMemCtrl: .word ADR_AMBER_TEST_MEM_CTRL`
`AdrTestStatus: .word ADR_AMBER_TEST_STATUS`	`AdrTestStatus: .word ADR_AMBER_TEST_STATUS`
`AdrInterruptStatus: .word ADR_AMBER_IC_IRQ0_STATUS`	`AdrInterruptStatus: .word ADR_AMBER_IC_IRQ0_STATUS`

	`AdrUARTDR: .word ADR_AMBER_UART0_DR`
	`AdrUARTFR: .word ADR_AMBER_UART0_FR`

`.align 2`	`.align 2`
`AdrATAGBase: .word ATAGBase`	`AdrATAGBase: .word ATAGBase`
`AdeEndATAG: .word EndATAG`	`AdeEndATAG: .word EndATAG`

`ATAGBase: .word ATAG_CORE_SIZE`	`ATAGBase: .word ATAG_CORE_SIZE`

Browse

Tools

Subversion Repositories amber

[/] [amber/] [trunk/] [sw/] [boot-loader-ethmac/] [start.S] - Diff between revs 61 and 78