URL https://opencores.org/ocsvn/open8_urisc/open8_urisc/trunk

Subversion Repositories open8_urisc

[/] [open8_urisc/] [trunk/] [taskmgr/] [taskmgr_const.s] - Diff between revs 305 and 306

Rev 305	Rev 306
Line 340...	Line 340...

`; INITIALIZE_TASK_STACK relocates the CPU stack pointer during setup, then`	`; INITIALIZE_TASK_STACK relocates the CPU stack pointer during setup, then`
`; simulates an RTI by loading an initial flag and return address, then resets`	`; simulates an RTI by loading an initial flag and return address, then resets`
`; all registers to 0`	`; all registers to 0`
`.MACRO INITIALIZE_TASK_STACK`	`.MACRO INITIALIZE_TASK_STACK`
	`REINIT_TASK_TABLE_PTR ; Use This_Task to initialize R3:R2`

`; Get the task's starting stack address from the table and load`	`; Get the task's starting stack address from the table and load`
`; it into the CPU SP`	`; it into the CPU SP`
`LDO R2, PARAM_STACK_ADDR_HIGH`	`LDO R2, PARAM_STACK_ADDR_HIGH`
`T0X R1`	`T0X R1`
`LDO R2, PARAM_STACK_ADDR_LOW`	`LDO R2, PARAM_STACK_ADDR_LOW`
Line 417...	Line 419...
`; state.`	`; state.`
`.MACRO SETUP_TASK`	`.MACRO SETUP_TASK`
`LDI R0, #\@`	`LDI R0, #\@`
`STA R0, TaskMgr.This_Task ; Write This_Task`	`STA R0, TaskMgr.This_Task ; Write This_Task`

`REINIT_TASK_TABLE_PTR ; Use This_Task to initialize R3:R2`
`INITIALIZE_TASK_STACK ; Setup the new task's stack area`	`INITIALIZE_TASK_STACK ; Setup the new task's stack area`
`SUSPEND_THIS_TASK ; Suspend the task to store setup`	`SUSPEND_THIS_TASK ; Suspend the task to store setup`
`.ENDM`	`.ENDM`

`; RESTORE_STACK_POINTER uses the This_Task variable to configure R3:R2 as a`	`; RESTORE_STACK_POINTER uses the This_Task variable to configure R3:R2 as a`