Data Structures
struct	Context_Control
	Thread register context. More...

struct	Context_Control_fp
	SPARC basic context. More...

Macros
#define	_CPU_Context_Get_SP(_context) (_context)->o6_sp

#define	G5_OFFSET 0x00

#define	G7_OFFSET 0x04

#define	L0_OFFSET 0x08

#define	L1_OFFSET 0x0C

#define	L2_OFFSET 0x10

#define	L3_OFFSET 0x14

#define	L4_OFFSET 0x18

#define	L5_OFFSET 0x1C

#define	L6_OFFSET 0x20

#define	L7_OFFSET 0x24

#define	I0_OFFSET 0x28

#define	I1_OFFSET 0x2C

#define	I2_OFFSET 0x30

#define	I3_OFFSET 0x34

#define	I4_OFFSET 0x38

#define	I5_OFFSET 0x3C

#define	I6_FP_OFFSET 0x40

#define	I7_OFFSET 0x44

#define	O6_SP_OFFSET 0x48

#define	O7_OFFSET 0x4C

#define	PSR_OFFSET 0x50

#define	ISR_DISPATCH_DISABLE_STACK_OFFSET 0x54

#define	FO_F1_OFFSET 0x00

#define	F2_F3_OFFSET 0x08

#define	F4_F5_OFFSET 0x10

#define	F6_F7_OFFSET 0x18

#define	F8_F9_OFFSET 0x20

#define	F1O_F11_OFFSET 0x28

#define	F12_F13_OFFSET 0x30

#define	F14_F15_OFFSET 0x38

#define	F16_F17_OFFSET 0x40

#define	F18_F19_OFFSET 0x48

#define	F2O_F21_OFFSET 0x50

#define	F22_F23_OFFSET 0x58

#define	F24_F25_OFFSET 0x60

#define	F26_F27_OFFSET 0x68

#define	F28_F29_OFFSET 0x70

#define	F3O_F31_OFFSET 0x78

#define	FSR_OFFSET 0x80

#define	CONTEXT_CONTROL_FP_SIZE 0x84

Typedefs
typedef struct Context_Control_fp	Context_Control_fp

Detailed Description

Generally there are 2 types of context to save.

Interrupt registers to save
Task level registers to save

This means we have the following 3 context items:

task level context stuff:: Context_Control
floating point task stuff:: Context_Control_fp
special interrupt level context :: Context_Control_interrupt

On the SPARC, we are relatively conservative in that we save most of the CPU state in the context area. The ET (enable trap) bit and the CWP (current window pointer) fields of the PSR are considered system wide resources and are not maintained on a per-thread basis.

Macro Definition Documentation

◆ _CPU_Context_Get_SP

#define _CPU_Context_Get_SP ( _context ) (_context)->o6_sp

This macro provides a CPU independent way for RTEMS to access the stack pointer in a context structure. The actual name and offset is CPU architecture dependent.

◆ CONTEXT_CONTROL_FP_SIZE

#define CONTEXT_CONTROL_FP_SIZE 0x84

This defines the size of the FPU context area for use in assembly.

◆ F12_F13_OFFSET

#define F12_F13_OFFSET 0x30

This macro defines an offset into the FPU context for use in assembly.

◆ F14_F15_OFFSET

#define F14_F15_OFFSET 0x38

This macro defines an offset into the FPU context for use in assembly.

◆ F16_F17_OFFSET

#define F16_F17_OFFSET 0x40

This macro defines an offset into the FPU context for use in assembly.

◆ F18_F19_OFFSET

#define F18_F19_OFFSET 0x48

This macro defines an offset into the FPU context for use in assembly.

◆ F1O_F11_OFFSET

#define F1O_F11_OFFSET 0x28

This macro defines an offset into the FPU context for use in assembly.

◆ F22_F23_OFFSET

#define F22_F23_OFFSET 0x58

This macro defines an offset into the FPU context for use in assembly.

◆ F24_F25_OFFSET

#define F24_F25_OFFSET 0x60

This macro defines an offset into the FPU context for use in assembly.

◆ F26_F27_OFFSET

#define F26_F27_OFFSET 0x68

This macro defines an offset into the FPU context for use in assembly.

◆ F28_F29_OFFSET

#define F28_F29_OFFSET 0x70

This macro defines an offset into the FPU context for use in assembly.

◆ F2_F3_OFFSET

#define F2_F3_OFFSET 0x08

This macro defines an offset into the FPU context for use in assembly.

◆ F2O_F21_OFFSET

#define F2O_F21_OFFSET 0x50

This macro defines an offset into the FPU context for use in assembly.

◆ F3O_F31_OFFSET

#define F3O_F31_OFFSET 0x78

This macro defines an offset into the FPU context for use in assembly.

◆ F4_F5_OFFSET

#define F4_F5_OFFSET 0x10

This macro defines an offset into the FPU context for use in assembly.

◆ F6_F7_OFFSET

#define F6_F7_OFFSET 0x18

This macro defines an offset into the FPU context for use in assembly.

◆ F8_F9_OFFSET

#define F8_F9_OFFSET 0x20

This macro defines an offset into the FPU context for use in assembly.

◆ FO_F1_OFFSET

#define FO_F1_OFFSET 0x00

This macro defines an offset into the FPU context for use in assembly.

◆ FSR_OFFSET

#define FSR_OFFSET 0x80

This macro defines an offset into the FPU context for use in assembly.