Thread register context. More...

#include <cpu.h>

Data Fields
void *	register_sp

uint32_t	register_r4

uint32_t	register_r5

uint32_t	register_r6

uint32_t	register_r7

uint32_t	register_p3

uint32_t	register_p4

uint32_t	register_p5

uint32_t	register_fp

uint32_t	register_sp

uint32_t	register_rets

uint32_t	imask

uint32_t	r [64]

uint32_t	status

uint32_t	config

uint32_t	iret

uint32_t	eflags

void *	esp

void *	ebp

uint32_t	ebx

uint32_t	esi

uint32_t	edi

segment_descriptors	gs

uint32_t	isr_dispatch_disable

uint32_t	r11

uint32_t	r12

uint32_t	r13

uint32_t	r14

uint32_t	r15

uint32_t	r16

uint32_t	r17

uint32_t	r18

uint32_t	r19

uint32_t	r20

uint32_t	r21

uint32_t	r22

uint32_t	r23

uint32_t	r24

uint32_t	r25

uint32_t	gp

uint32_t	fp

uint32_t	sp

uint32_t	ra

uint32_t	ie

uint32_t	epc

uint32_t	sr

uint32_t	d2

uint32_t	d3

uint32_t	d4

uint32_t	d5

uint32_t	d6

uint32_t	d7

void *	a2

void *	a3

void *	a4

void *	a5

void *	a6

void *	a7_msp

__MIPS_REGISTER_TYPE	s0

__MIPS_REGISTER_TYPE	s1

__MIPS_REGISTER_TYPE	s2

__MIPS_REGISTER_TYPE	s3

__MIPS_REGISTER_TYPE	s4

__MIPS_REGISTER_TYPE	s5

__MIPS_REGISTER_TYPE	s6

__MIPS_REGISTER_TYPE	s7

__MIPS_REGISTER_TYPE	sp

__MIPS_REGISTER_TYPE	fp

__MIPS_REGISTER_TYPE	ra

__MIPS_REGISTER_TYPE	c0_sr

__MIPS_REGISTER_TYPE	c0_epc

void *fp	nogap

void *sp	nogap

uint32_t r0	nogap

uint32_t r1	nogap

uint32_t r2	nogap

uint32_t r3	nogap

uint32_t r4	nogap

uint32_t r5	nogap

uint32_t r6	nogap

uint32_t r7	nogap

uint32_t r8	nogap

uint32_t r9	nogap

uint32_t r10	nogap

uint32_t r11	nogap

uint32_t r12	nogap

uint32_t r13	nogap

uint32_t	thread_dispatch_disabled

uint32_t	stack_mpubase

uint32_t	stack_mpuacc

uint32_t	some_integer_register

uint32_t	some_system_register

uint32_t	stack_pointer

uint32_t	r1

uint32_t	r2

uint32_t	r3

uint32_t	r4

uint32_t	r5

uint32_t	r6

uint32_t	r7

uint32_t	r8

uint32_t	r9

uint32_t	r10

uint32_t	r26

uint32_t	r27

uint32_t	r28

uint32_t	r29

uint32_t	r30

uint32_t	r31

uint32_t	epcr

uint32_t	eear

uint32_t	esr

uint8_t	context [PPC_DEFAULT_CACHE_LINE_SIZE+sizeof(ppc_context)+(sizeof(ppc_context) % PPC_DEFAULT_CACHE_LINE_SIZE==0 ? 0 :PPC_DEFAULT_CACHE_LINE_SIZE - sizeof(ppc_context) % PPC_DEFAULT_CACHE_LINE_SIZE)]

uint32_t	reserved

uintptr_t	ra

uintptr_t	sp

uintptr_t	tp

uintptr_t	s0

uintptr_t	s1

uintptr_t	s2

uintptr_t	s3

uintptr_t	s4

uintptr_t	s5

uintptr_t	s6

uintptr_t	s7

uintptr_t	s8

uintptr_t	s9

uintptr_t	s10

uintptr_t	s11

uint32_t *	r15

uint32_t	macl

uint32_t	mach

uint32_t *	pr

uint32_t *	r14

uint32_t *	r7

uint32_t *	r6

uint32_t *	r3

uint32_t *	r2

uint32_t *	r1

uint32_t *	r0

uint32_t	gbr

uint32_t	g5

uint32_t	g7

double	l0_and_l1

uint32_t	l2

uint32_t	l3

uint32_t	l4

uint32_t	l5

uint32_t	l6

uint32_t	l7

uint32_t	i0

uint32_t	i1

uint32_t	i2

uint32_t	i3

uint32_t	i4

uint32_t	i5

uint32_t	i6_fp

uint32_t	i7

uint32_t	o6_sp

uint32_t	o7

uint32_t	psr

uint64_t	g1

uint64_t	g2

uint64_t	g3

uint64_t	g4

uint64_t	g5

uint64_t	g6

uint64_t	g7

uint64_t	l0

uint64_t	l1

uint64_t	l2

uint64_t	l3

uint64_t	l4

uint64_t	l5

uint64_t	l6

uint64_t	l7

uint64_t	i0

uint64_t	i1

uint64_t	i2

uint64_t	i3

uint64_t	i4

uint64_t	i5

uint64_t	i6_fp

uint64_t	i7

uint64_t	o0

uint64_t	o1

uint64_t	o2

uint64_t	o3

uint64_t	o4

uint64_t	o5

uint64_t	o6_sp

uint64_t	o7

uint32_t	pad

uint32_t	r3_stack_pointer

uint32_t	psw

uint64_t	rflags

uint64_t	rbx

void *	rsp

void *	rbp

uint64_t	r12

uint64_t	r13

uint64_t	r14

uint64_t	r15

Detailed Description

Thread register context.

SPARC basic context.

This defines the minimal set of integer and processor state registers that must be saved during a voluntary context switch from one thread to another.

The thread register context covers the non-volatile registers, the thread stack pointer, the return address, and the processor status.

There is no need to save the global pointer (gp) since it is a system wide constant and set-up with the C runtime environment.

The thread_dispatch_disabled field is used for the external interrupt controller (EIC) support.

See also: _Nios2_Thread_dispatch_disabled

This structure defines the non-volatile integer and processor state context for the SPARC architecture according to "SYSTEM V APPLICATION BINARY INTERFACE - SPARC Processor Supplement", Third Edition.

The registers g2 through g4 are reserved for applications. GCC uses them as volatile registers by default. So they are treated like volatile registers in RTEMS as well.

The register g6 contains the per-CPU control of the current processor. It is an invariant of the processor context. This register must not be saved and restored during context switches or interrupt services.

Field Documentation

◆ g5

uint32_t Context_Control::g5

This will contain the contents of the g5 register.

◆ g7

uint32_t Context_Control::g7

This will contain the contents of the g7 register.

◆ i0

uint32_t Context_Control::i0

This will contain the contents of the i0 register.

◆ i1

uint32_t Context_Control::i1

This will contain the contents of the i1 register.

◆ i2

uint32_t Context_Control::i2

This will contain the contents of the i2 register.

◆ i3

uint32_t Context_Control::i3

This will contain the contents of the i3 register.

◆ i4

uint32_t Context_Control::i4

This will contain the contents of the i4 register.

◆ i5

uint32_t Context_Control::i5

This will contain the contents of the i5 register.

◆ i6_fp

uint32_t Context_Control::i6_fp

This will contain the contents of the i6 (e.g. frame pointer) register.

◆ i7

uint32_t Context_Control::i7

This will contain the contents of the i7 register.

◆ isr_dispatch_disable

uint32_t Context_Control::isr_dispatch_disable

This field is used to prevent heavy nesting of calls to _Thread_Dispatch on an interrupted task's stack. This is problematic on the slower SPARC CPU models at high interrupt rates.

◆ l0_and_l1

double Context_Control::l0_and_l1

This will contain the contents of the l0 and l1 registers.

Using a double l0_and_l1 will put everything in this structure on a double word boundary which allows us to use double word loads and stores safely in the context switch.

◆ l2

uint32_t Context_Control::l2

This will contain the contents of the l2 register.

◆ l3

uint32_t Context_Control::l3

This will contain the contents of the l3 register.

◆ l4

uint32_t Context_Control::l4

This will contain the contents of the l4 register.

◆ l5

uint32_t Context_Control::l5

This will contain the contents of the l5 registeer.

◆ l6

uint32_t Context_Control::l6

This will contain the contents of the l6 register.

◆ l7

uint32_t Context_Control::l7

This will contain the contents of the l7 register.

◆ o6_sp

uint32_t Context_Control::o6_sp

This will contain the contents of the o6 (e.g. frame pointer) register.

◆ o7

uint32_t Context_Control::o7

This will contain the contents of the o7 (e.g. address of CALL instruction) register.

◆ psr

uint32_t Context_Control::psr

This will contain the contents of the processor status register.

◆ r3_stack_pointer

uint32_t Context_Control::r3_stack_pointer

This field is the stack pointer (e.g. r3).

◆ rbx

uint64_t Context_Control::rbx

Callee-saved registers as listed in the SysV ABI document: https://github.com/hjl-tools/x86-psABI/wiki/X86-psABI

◆ some_integer_register

uint32_t Context_Control::some_integer_register

This field is a hint that a port will have a number of integer registers that need to be saved at a context switch.

◆ some_system_register

uint32_t Context_Control::some_system_register

This field is a hint that a port will have a number of system registers that need to be saved at a context switch.

◆ stack_pointer

uint32_t Context_Control::stack_pointer

This field is a hint that a port will have a register that is the stack pointer.

The documentation for this struct was generated from the following file:

cpukit/score/cpu/arm/include/rtems/score/cpu.h

Data Fields