linux/arch/arm/include/asm/vfp.h

/*
 * arch/arm/include/asm/vfp.h
 *
 * VFP register definitions.
 * First, the standard VFP set.
 */

#define FPSID			cr0
#define FPSCR			cr1
#define MVFR1			cr6
#define MVFR0			cr7
#define FPEXC			cr8
#define FPINST			cr9
#define FPINST2			cr10

/* FPSID bits */
#define FPSID_IMPLEMENTER_BIT	(24)
#define FPSID_IMPLEMENTER_MASK	(0xff << FPSID_IMPLEMENTER_BIT)
#define FPSID_SOFTWARE		(1<<23)
#define FPSID_FORMAT_BIT	(21)
#define FPSID_FORMAT_MASK	(0x3  << FPSID_FORMAT_BIT)
#define FPSID_NODOUBLE		(1<<20)
#define FPSID_ARCH_BIT		(16)
#define FPSID_ARCH_MASK		(0xF  << FPSID_ARCH_BIT)
#define FPSID_PART_BIT		(8)
#define FPSID_PART_MASK		(0xFF << FPSID_PART_BIT)
#define FPSID_VARIANT_BIT	(4)
#define FPSID_VARIANT_MASK	(0xF  << FPSID_VARIANT_BIT)
#define FPSID_REV_BIT		(0)
#define FPSID_REV_MASK		(0xF  << FPSID_REV_BIT)

/* FPEXC bits */
#define FPEXC_EX		(1 << 31)
#define FPEXC_EN		(1 << 30)
#define FPEXC_DEX		(1 << 29)
#define FPEXC_FP2V		(1 << 28)
#define FPEXC_VV		(1 << 27)
#define FPEXC_TFV		(1 << 26)
#define FPEXC_LENGTH_BIT	(8)
#define FPEXC_LENGTH_MASK	(7 << FPEXC_LENGTH_BIT)
#define FPEXC_IDF		(1 << 7)
#define FPEXC_IXF		(1 << 4)
#define FPEXC_UFF		(1 << 3)
#define FPEXC_OFF		(1 << 2)
#define FPEXC_DZF		(1 << 1)
#define FPEXC_IOF		(1 << 0)
#define FPEXC_TRAP_MASK		(FPEXC_IDF|FPEXC_IXF|FPEXC_UFF|FPEXC_OFF|FPEXC_DZF|FPEXC_IOF)

/* FPSCR bits */
#define FPSCR_DEFAULT_NAN	(1<<25)
#define FPSCR_FLUSHTOZERO	(1<<24)
#define FPSCR_ROUND_NEAREST	(0<<22)
#define FPSCR_ROUND_PLUSINF	(1<<22)
#define FPSCR_ROUND_MINUSINF	(2<<22)
#define FPSCR_ROUND_TOZERO	(3<<22)
#define FPSCR_RMODE_BIT		(22)
#define FPSCR_RMODE_MASK	(3 << FPSCR_RMODE_BIT)
#define FPSCR_STRIDE_BIT	(20)
#define FPSCR_STRIDE_MASK	(3 << FPSCR_STRIDE_BIT)
#define FPSCR_LENGTH_BIT	(16)
#define FPSCR_LENGTH_MASK	(7 << FPSCR_LENGTH_BIT)
#define FPSCR_IOE		(1<<8)
#define FPSCR_DZE		(1<<9)
#define FPSCR_OFE		(1<<10)
#define FPSCR_UFE		(1<<11)
#define FPSCR_IXE		(1<<12)
#define FPSCR_IDE		(1<<15)
#define FPSCR_IOC		(1<<0)
#define FPSCR_DZC		(1<<1)
#define FPSCR_OFC		(1<<2)
#define FPSCR_UFC		(1<<3)
#define FPSCR_IXC		(1<<4)
#define FPSCR_IDC		(1<<7)

/* MVFR0 bits */
#define MVFR0_A_SIMD_BIT	(0)
#define MVFR0_A_SIMD_MASK	(0xf << MVFR0_A_SIMD_BIT)

/* Bit patterns for decoding the packaged operation descriptors */
#define VFPOPDESC_LENGTH_BIT	(9)
#define VFPOPDESC_LENGTH_MASK	(0x07 << VFPOPDESC_LENGTH_BIT)
#define VFPOPDESC_UNUSED_BIT	(24)
#define VFPOPDESC_UNUSED_MASK	(0xFF << VFPOPDESC_UNUSED_BIT)
#define VFPOPDESC_OPDESC_MASK	(~(VFPOPDESC_LENGTH_MASK | VFPOPDESC_UNUSED_MASK))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`/*`
[ARM] move include/asm-arm to arch/arm/include/asm Move platform independent header files to arch/arm/include/asm, leaving those in asm/arch* and asm/plat* alone. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2008-08-02 09:55:55 +00:00			`* arch/arm/include/asm/vfp.h`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`*`
			`* VFP register definitions.`
			`* First, the standard VFP set.`
			`*/`

			`#define FPSID cr0`
			`#define FPSCR cr1`
[ARM] 4583/1: ARMv7: Add VFPv3 support This patch adds the support for VFPv3 (the kernel currently supports VFPv2). The main difference is 32 double registers (compared to 16). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-09-25 14:22:24 +00:00			`#define MVFR1 cr6`
			`#define MVFR0 cr7`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`#define FPEXC cr8`
[ARM] 4582/2: Add support for the common VFP subarchitecture This patch allows the VFP support code to run correctly on CPUs compatible with the common VFP subarchitecture specification (Appendix B in the ARM ARM v7-A and v7-R edition). It implements support for VFP subarchitecture 2 while being backwards compatible with subarchitecture 1. On VFP subarchitecture 1, the arithmetic exceptions are asynchronous (or imprecise as described in the old ARM ARM) unless the FPSCR.IXE bit is 1. The exceptional instructions can be read from FPINST and FPINST2 registers. With VFP subarchitecture 2, the arithmetic exceptions can also be synchronous and marked by the FPEXC.DEX bit (the FPEXC.EX bit is cleared). CPUs implementing the synchronous arithmetic exceptions don't have the FPINST and FPINST2 registers and accessing them would trigger and undefined exception. Note that FPEXC.EX bit has an additional meaning on subarchitecture 1 - if it isn't set, there is no additional information in FPINST and FPINST2 that needs to be saved at context switch or when lazy-loading the VFP state of a different thread. The patch also removes the clearing of the cumulative exception flags in FPSCR when additional exceptions were raised. It is up to the user application to clear these bits. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-11-22 17:32:01 +00:00			`#define FPINST cr9`
			`#define FPINST2 cr10`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00
			`/* FPSID bits */`
			`#define FPSID_IMPLEMENTER_BIT (24)`
			`#define FPSID_IMPLEMENTER_MASK (0xff << FPSID_IMPLEMENTER_BIT)`
			`#define FPSID_SOFTWARE (1<<23)`
			`#define FPSID_FORMAT_BIT (21)`
			`#define FPSID_FORMAT_MASK (0x3 << FPSID_FORMAT_BIT)`
			`#define FPSID_NODOUBLE (1<<20)`
			`#define FPSID_ARCH_BIT (16)`
			`#define FPSID_ARCH_MASK (0xF << FPSID_ARCH_BIT)`
			`#define FPSID_PART_BIT (8)`
			`#define FPSID_PART_MASK (0xFF << FPSID_PART_BIT)`
			`#define FPSID_VARIANT_BIT (4)`
			`#define FPSID_VARIANT_MASK (0xF << FPSID_VARIANT_BIT)`
			`#define FPSID_REV_BIT (0)`
			`#define FPSID_REV_MASK (0xF << FPSID_REV_BIT)`

			`/* FPEXC bits */`
[ARM] vfp: make fpexc bit names less verbose Use the fpexc abbreviated names instead of long verbose names for fpexc bits. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-07-18 08:37:10 +00:00			`#define FPEXC_EX (1 << 31)`
			`#define FPEXC_EN (1 << 30)`
[ARM] 4582/2: Add support for the common VFP subarchitecture This patch allows the VFP support code to run correctly on CPUs compatible with the common VFP subarchitecture specification (Appendix B in the ARM ARM v7-A and v7-R edition). It implements support for VFP subarchitecture 2 while being backwards compatible with subarchitecture 1. On VFP subarchitecture 1, the arithmetic exceptions are asynchronous (or imprecise as described in the old ARM ARM) unless the FPSCR.IXE bit is 1. The exceptional instructions can be read from FPINST and FPINST2 registers. With VFP subarchitecture 2, the arithmetic exceptions can also be synchronous and marked by the FPEXC.DEX bit (the FPEXC.EX bit is cleared). CPUs implementing the synchronous arithmetic exceptions don't have the FPINST and FPINST2 registers and accessing them would trigger and undefined exception. Note that FPEXC.EX bit has an additional meaning on subarchitecture 1 - if it isn't set, there is no additional information in FPINST and FPINST2 that needs to be saved at context switch or when lazy-loading the VFP state of a different thread. The patch also removes the clearing of the cumulative exception flags in FPSCR when additional exceptions were raised. It is up to the user application to clear these bits. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-11-22 17:32:01 +00:00			`#define FPEXC_DEX (1 << 29)`
			`#define FPEXC_FP2V (1 << 28)`
			`#define FPEXC_VV (1 << 27)`
			`#define FPEXC_TFV (1 << 26)`
			`#define FPEXC_LENGTH_BIT (8)`
			`#define FPEXC_LENGTH_MASK (7 << FPEXC_LENGTH_BIT)`
			`#define FPEXC_IDF (1 << 7)`
			`#define FPEXC_IXF (1 << 4)`
			`#define FPEXC_UFF (1 << 3)`
			`#define FPEXC_OFF (1 << 2)`
			`#define FPEXC_DZF (1 << 1)`
			`#define FPEXC_IOF (1 << 0)`
			`#define FPEXC_TRAP_MASK (FPEXC_IDF\|FPEXC_IXF\|FPEXC_UFF\|FPEXC_OFF\|FPEXC_DZF\|FPEXC_IOF)`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00
			`/* FPSCR bits */`
			`#define FPSCR_DEFAULT_NAN (1<<25)`
			`#define FPSCR_FLUSHTOZERO (1<<24)`
			`#define FPSCR_ROUND_NEAREST (0<<22)`
			`#define FPSCR_ROUND_PLUSINF (1<<22)`
			`#define FPSCR_ROUND_MINUSINF (2<<22)`
			`#define FPSCR_ROUND_TOZERO (3<<22)`
			`#define FPSCR_RMODE_BIT (22)`
			`#define FPSCR_RMODE_MASK (3 << FPSCR_RMODE_BIT)`
			`#define FPSCR_STRIDE_BIT (20)`
			`#define FPSCR_STRIDE_MASK (3 << FPSCR_STRIDE_BIT)`
			`#define FPSCR_LENGTH_BIT (16)`
			`#define FPSCR_LENGTH_MASK (7 << FPSCR_LENGTH_BIT)`
			`#define FPSCR_IOE (1<<8)`
			`#define FPSCR_DZE (1<<9)`
			`#define FPSCR_OFE (1<<10)`
			`#define FPSCR_UFE (1<<11)`
			`#define FPSCR_IXE (1<<12)`
			`#define FPSCR_IDE (1<<15)`
			`#define FPSCR_IOC (1<<0)`
			`#define FPSCR_DZC (1<<1)`
			`#define FPSCR_OFC (1<<2)`
			`#define FPSCR_UFC (1<<3)`
			`#define FPSCR_IXC (1<<4)`
			`#define FPSCR_IDC (1<<7)`

[ARM] 4583/1: ARMv7: Add VFPv3 support This patch adds the support for VFPv3 (the kernel currently supports VFPv2). The main difference is 32 double registers (compared to 16). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2007-09-25 14:22:24 +00:00			`/* MVFR0 bits */`
			`#define MVFR0_A_SIMD_BIT (0)`
			`#define MVFR0_A_SIMD_MASK (0xf << MVFR0_A_SIMD_BIT)`

Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`/* Bit patterns for decoding the packaged operation descriptors */`
			`#define VFPOPDESC_LENGTH_BIT (9)`
			`#define VFPOPDESC_LENGTH_MASK (0x07 << VFPOPDESC_LENGTH_BIT)`
			`#define VFPOPDESC_UNUSED_BIT (24)`
			`#define VFPOPDESC_UNUSED_MASK (0xFF << VFPOPDESC_UNUSED_BIT)`
			`#define VFPOPDESC_OPDESC_MASK (~(VFPOPDESC_LENGTH_MASK \| VFPOPDESC_UNUSED_MASK))`