[XTENSA] Add support for configurable registers and coprocessors
The Xtensa architecture allows to define custom instructions and
registers. Registers that are bound to a coprocessor are only
accessible if the corresponding enable bit is set, which allows
to implement a 'lazy' context switch mechanism. Other registers
needs to be saved and restore at the time of the context switch
or during interrupt handling.
This patch adds support for these additional states:
- save and restore registers that are used by the compiler upon
interrupt entry and exit.
- context switch additional registers unbound to any coprocessor
- 'lazy' context switch of registers bound to a coprocessor
- ptrace interface to provide access to additional registers
- update configuration files in include/asm-xtensa/variant-fsf
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/include/asm-xtensa/coprocessor.h b/include/asm-xtensa/coprocessor.h
index aa21210..e5849bb 100644
--- a/include/asm-xtensa/coprocessor.h
+++ b/include/asm-xtensa/coprocessor.h
@@ -5,81 +5,168 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2003 - 2005 Tensilica Inc.
+ * Copyright (C) 2003 - 2007 Tensilica Inc.
*/
+
#ifndef _XTENSA_COPROCESSOR_H
#define _XTENSA_COPROCESSOR_H
-#include <asm/variant/core.h>
+#include <linux/stringify.h>
#include <asm/variant/tie.h>
+#include <asm/types.h>
-#if !XCHAL_HAVE_CP
+#ifdef __ASSEMBLY__
+# include <asm/variant/tie-asm.h>
-#define XTENSA_CP_EXTRA_OFFSET 0
-#define XTENSA_CP_EXTRA_ALIGN 1 /* must be a power of 2 */
-#define XTENSA_CP_EXTRA_SIZE 0
+.macro xchal_sa_start a b
+ .set .Lxchal_pofs_, 0
+ .set .Lxchal_ofs_, 0
+.endm
-#else
+.macro xchal_sa_align ptr minofs maxofs ofsalign totalign
+ .set .Lxchal_ofs_, .Lxchal_ofs_ + .Lxchal_pofs_ + \totalign - 1
+ .set .Lxchal_ofs_, (.Lxchal_ofs_ & -\totalign) - .Lxchal_pofs_
+.endm
-#define XTOFS(last_start,last_size,align) \
- ((last_start+last_size+align-1) & -align)
+#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
+ | XTHAL_SAS_CC \
+ | XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )
-#define XTENSA_CP_EXTRA_OFFSET 0
-#define XTENSA_CP_EXTRA_ALIGN XCHAL_EXTRA_SA_ALIGN
+.macro save_xtregs_opt ptr clb at1 at2 at3 at4 offset
+ .if XTREGS_OPT_SIZE > 0
+ addi \clb, \ptr, \offset
+ xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
+ .endif
+.endm
-#define XTENSA_CPE_CP0_OFFSET \
- XTOFS(XTENSA_CP_EXTRA_OFFSET, XCHAL_EXTRA_SA_SIZE, XCHAL_CP0_SA_ALIGN)
-#define XTENSA_CPE_CP1_OFFSET \
- XTOFS(XTENSA_CPE_CP0_OFFSET, XCHAL_CP0_SA_SIZE, XCHAL_CP1_SA_ALIGN)
-#define XTENSA_CPE_CP2_OFFSET \
- XTOFS(XTENSA_CPE_CP1_OFFSET, XCHAL_CP1_SA_SIZE, XCHAL_CP2_SA_ALIGN)
-#define XTENSA_CPE_CP3_OFFSET \
- XTOFS(XTENSA_CPE_CP2_OFFSET, XCHAL_CP2_SA_SIZE, XCHAL_CP3_SA_ALIGN)
-#define XTENSA_CPE_CP4_OFFSET \
- XTOFS(XTENSA_CPE_CP3_OFFSET, XCHAL_CP3_SA_SIZE, XCHAL_CP4_SA_ALIGN)
-#define XTENSA_CPE_CP5_OFFSET \
- XTOFS(XTENSA_CPE_CP4_OFFSET, XCHAL_CP4_SA_SIZE, XCHAL_CP5_SA_ALIGN)
-#define XTENSA_CPE_CP6_OFFSET \
- XTOFS(XTENSA_CPE_CP5_OFFSET, XCHAL_CP5_SA_SIZE, XCHAL_CP6_SA_ALIGN)
-#define XTENSA_CPE_CP7_OFFSET \
- XTOFS(XTENSA_CPE_CP6_OFFSET, XCHAL_CP6_SA_SIZE, XCHAL_CP7_SA_ALIGN)
-#define XTENSA_CP_EXTRA_SIZE \
- XTOFS(XTENSA_CPE_CP7_OFFSET, XCHAL_CP7_SA_SIZE, 16)
+.macro load_xtregs_opt ptr clb at1 at2 at3 at4 offset
+ .if XTREGS_OPT_SIZE > 0
+ addi \clb, \ptr, \offset
+ xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
+ .endif
+.endm
+#undef _SELECT
-#if XCHAL_CP_NUM > 0
-# ifndef __ASSEMBLY__
+#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
+ | XTHAL_SAS_NOCC \
+ | XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )
+
+.macro save_xtregs_user ptr clb at1 at2 at3 at4 offset
+ .if XTREGS_USER_SIZE > 0
+ addi \clb, \ptr, \offset
+ xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
+ .endif
+.endm
+
+.macro load_xtregs_user ptr clb at1 at2 at3 at4 offset
+ .if XTREGS_USER_SIZE > 0
+ addi \clb, \ptr, \offset
+ xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
+ .endif
+.endm
+#undef _SELECT
+
+
+
+#endif /* __ASSEMBLY__ */
+
/*
- * Tasks that own contents of (last user) each coprocessor.
- * Entries are 0 for not-owned or non-existent coprocessors.
- * Note: The size of this structure is fixed to 8 bytes in entry.S
+ * XTENSA_HAVE_COPROCESSOR(x) returns 1 if coprocessor x is configured.
+ *
+ * XTENSA_HAVE_IO_PORT(x) returns 1 if io-port x is configured.
+ *
*/
-typedef struct {
- struct task_struct *owner; /* owner */
- int offset; /* offset in cpextra space. */
-} coprocessor_info_t;
-# else
-# define COPROCESSOR_INFO_OWNER 0
-# define COPROCESSOR_INFO_OFFSET 4
-# define COPROCESSOR_INFO_SIZE 8
-# endif
-#endif
-#endif /* XCHAL_HAVE_CP */
+#define XTENSA_HAVE_COPROCESSOR(x) \
+ ((XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK) & (1 << (x)))
+#define XTENSA_HAVE_COPROCESSORS \
+ (XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK)
+#define XTENSA_HAVE_IO_PORT(x) \
+ (XCHAL_CP_PORT_MASK & (1 << (x)))
+#define XTENSA_HAVE_IO_PORTS \
+ XCHAL_CP_PORT_MASK
#ifndef __ASSEMBLY__
-# if XCHAL_CP_NUM > 0
-struct task_struct;
-extern void release_coprocessors (struct task_struct*);
-extern void save_coprocessor_registers(void*, int);
-# else
-# define release_coprocessors(task)
-# endif
-typedef unsigned char cp_state_t[XTENSA_CP_EXTRA_SIZE]
- __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN)));
+
+#if XCHAL_HAVE_CP
+
+#define RSR_CPENABLE(x) do { \
+ __asm__ __volatile__("rsr %0," __stringify(CPENABLE) : "=a" (x)); \
+ } while(0);
+#define WSR_CPENABLE(x) do { \
+ __asm__ __volatile__("wsr %0," __stringify(CPENABLE) "; rsync" \
+ :: "a" (x)); \
+ } while(0);
+
+#endif /* XCHAL_HAVE_CP */
+
+
+/*
+ * Additional registers.
+ * We define three types of additional registers:
+ * ext: extra registers that are used by the compiler
+ * cpn: optional registers that can be used by a user application
+ * cpX: coprocessor registers that can only be used if the corresponding
+ * CPENABLE bit is set.
+ */
+
+#define XCHAL_SA_REG(list,compiler,x,type,y,name,z,align,size,...) \
+ __REG ## list (compiler, type, name, size, align)
+
+#define __REG0(compiler,t,name,s,a) __REG0_ ## compiler (name)
+#define __REG1(compiler,t,name,s,a) __REG1_ ## compiler (name)
+#define __REG2(c,type,...) __REG2_ ## type (__VA_ARGS__)
+
+#define __REG0_0(name)
+#define __REG0_1(name) __u32 name;
+#define __REG1_0(name) __u32 name;
+#define __REG1_1(name)
+#define __REG2_0(n,s,a) __u32 name;
+#define __REG2_1(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
+#define __REG2_2(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
+
+typedef struct { XCHAL_NCP_SA_LIST(0) } xtregs_opt_t
+ __attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
+typedef struct { XCHAL_NCP_SA_LIST(1) } xtregs_user_t
+ __attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
+
+#if XTENSA_HAVE_COPROCESSORS
+
+typedef struct { XCHAL_CP0_SA_LIST(2) } xtregs_cp0_t
+ __attribute__ ((aligned (XCHAL_CP0_SA_ALIGN)));
+typedef struct { XCHAL_CP1_SA_LIST(2) } xtregs_cp1_t
+ __attribute__ ((aligned (XCHAL_CP1_SA_ALIGN)));
+typedef struct { XCHAL_CP2_SA_LIST(2) } xtregs_cp2_t
+ __attribute__ ((aligned (XCHAL_CP2_SA_ALIGN)));
+typedef struct { XCHAL_CP3_SA_LIST(2) } xtregs_cp3_t
+ __attribute__ ((aligned (XCHAL_CP3_SA_ALIGN)));
+typedef struct { XCHAL_CP4_SA_LIST(2) } xtregs_cp4_t
+ __attribute__ ((aligned (XCHAL_CP4_SA_ALIGN)));
+typedef struct { XCHAL_CP5_SA_LIST(2) } xtregs_cp5_t
+ __attribute__ ((aligned (XCHAL_CP5_SA_ALIGN)));
+typedef struct { XCHAL_CP6_SA_LIST(2) } xtregs_cp6_t
+ __attribute__ ((aligned (XCHAL_CP6_SA_ALIGN)));
+typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t
+ __attribute__ ((aligned (XCHAL_CP7_SA_ALIGN)));
+
+extern struct thread_info* coprocessor_owner[XCHAL_CP_MAX];
+extern void coprocessor_save(void*, int);
+extern void coprocessor_load(void*, int);
+extern void coprocessor_flush(struct thread_info*, int);
+extern void coprocessor_restore(struct thread_info*, int);
+
+extern void coprocessor_release_all(struct thread_info*);
+extern void coprocessor_flush_all(struct thread_info*);
+
+static inline void coprocessor_clear_cpenable(void)
+{
+ unsigned long i = 0;
+ WSR_CPENABLE(i);
+}
+
+#endif /* XTENSA_HAVE_COPROCESSORS */
#endif /* !__ASSEMBLY__ */
-
-
#endif /* _XTENSA_COPROCESSOR_H */
diff --git a/include/asm-xtensa/elf.h b/include/asm-xtensa/elf.h
index 86479b8..11103e0 100644
--- a/include/asm-xtensa/elf.h
+++ b/include/asm-xtensa/elf.h
@@ -173,6 +173,21 @@
_r->areg[12]=0; _r->areg[13]=0; _r->areg[14]=0; _r->areg[15]=0; \
} while (0)
+typedef struct {
+ xtregs_opt_t opt;
+ xtregs_user_t user;
+#if XTENSA_HAVE_COPROCESSORS
+ xtregs_cp0_t cp0;
+ xtregs_cp1_t cp1;
+ xtregs_cp2_t cp2;
+ xtregs_cp3_t cp3;
+ xtregs_cp4_t cp4;
+ xtregs_cp5_t cp5;
+ xtregs_cp6_t cp6;
+ xtregs_cp7_t cp7;
+#endif
+} elf_xtregs_t;
+
#define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX_32BIT)
struct task_struct;
diff --git a/include/asm-xtensa/processor.h b/include/asm-xtensa/processor.h
index 96408f4..4918a4e 100644
--- a/include/asm-xtensa/processor.h
+++ b/include/asm-xtensa/processor.h
@@ -103,10 +103,6 @@
unsigned long dbreaka[XCHAL_NUM_DBREAK];
unsigned long dbreakc[XCHAL_NUM_DBREAK];
- /* Allocate storage for extra state and coprocessor state. */
- unsigned char cp_save[XTENSA_CP_EXTRA_SIZE]
- __attribute__ ((aligned(XTENSA_CP_EXTRA_ALIGN)));
-
/* Make structure 16 bytes aligned. */
int align[0] __attribute__ ((aligned(16)));
};
@@ -162,21 +158,16 @@
struct task_struct;
struct mm_struct;
-// FIXME: do we need release_thread for CP??
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
-// FIXME: do we need prepare_to_copy (lazy status) for CP??
/* Prepare to copy thread state - unlazy all lazy status */
-#define prepare_to_copy(tsk) do { } while (0)
+extern void prepare_to_copy(struct task_struct*);
-/*
- * create a kernel thread without removing it from tasklists
- */
+/* Create a kernel thread without removing it from tasklists */
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
/* Copy and release all segment info associated with a VM */
-
#define copy_segments(p, mm) do { } while(0)
#define release_segments(mm) do { } while(0)
#define forget_segments() do { } while (0)
diff --git a/include/asm-xtensa/ptrace.h b/include/asm-xtensa/ptrace.h
index 77ff02d..422c73e 100644
--- a/include/asm-xtensa/ptrace.h
+++ b/include/asm-xtensa/ptrace.h
@@ -53,33 +53,30 @@
/* Registers used by strace */
-#define REG_A_BASE 0xfc000000
-#define REG_AR_BASE 0x04000000
-#define REG_PC 0x14000000
-#define REG_PS 0x080000e6
-#define REG_WB 0x08000048
-#define REG_WS 0x08000049
-#define REG_LBEG 0x08000000
-#define REG_LEND 0x08000001
-#define REG_LCOUNT 0x08000002
-#define REG_SAR 0x08000003
-#define REG_DEPC 0x080000c0
-#define REG_EXCCAUSE 0x080000e8
-#define REG_EXCVADDR 0x080000ee
-#define SYSCALL_NR 0x1
+#define REG_A_BASE 0x0000
+#define REG_AR_BASE 0x0100
+#define REG_PC 0x0020
+#define REG_PS 0x02e6
+#define REG_WB 0x0248
+#define REG_WS 0x0249
+#define REG_LBEG 0x0200
+#define REG_LEND 0x0201
+#define REG_LCOUNT 0x0202
+#define REG_SAR 0x0203
-#define AR_REGNO_TO_A_REGNO(ar, wb) (ar - wb*4) & ~(XCHAL_NUM_AREGS - 1)
+#define SYSCALL_NR 0x00ff
/* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
-#define PTRACE_GETREGS 12
-#define PTRACE_SETREGS 13
-#define PTRACE_GETFPREGS 14
-#define PTRACE_SETFPREGS 15
-#define PTRACE_GETFPREGSIZE 18
+#define PTRACE_GETREGS 12
+#define PTRACE_SETREGS 13
+#define PTRACE_GETXTREGS 18
+#define PTRACE_SETXTREGS 19
#ifndef __ASSEMBLY__
+#ifdef __KERNEL__
+
/*
* This struct defines the way the registers are stored on the
* kernel stack during a system call or other kernel entry.
@@ -102,6 +99,9 @@
unsigned long icountlevel; /* 60 */
int reserved[1]; /* 64 */
+ /* Additional configurable registers that are used by the compiler. */
+ xtregs_opt_t xtregs_opt;
+
/* Make sure the areg field is 16 bytes aligned. */
int align[0] __attribute__ ((aligned(16)));
@@ -111,8 +111,6 @@
unsigned long areg[16]; /* 128 (64) */
};
-#ifdef __KERNEL__
-
#include <asm/variant/core.h>
# define task_pt_regs(tsk) ((struct pt_regs*) \
diff --git a/include/asm-xtensa/regs.h b/include/asm-xtensa/regs.h
index c913d25..d4baed2 100644
--- a/include/asm-xtensa/regs.h
+++ b/include/asm-xtensa/regs.h
@@ -100,7 +100,14 @@
#define EXCCAUSE_DTLB_SIZE_RESTRICTION 27
#define EXCCAUSE_LOAD_CACHE_ATTRIBUTE 28
#define EXCCAUSE_STORE_CACHE_ATTRIBUTE 29
-#define EXCCAUSE_FLOATING_POINT 40
+#define EXCCAUSE_COPROCESSOR0_DISABLED 32
+#define EXCCAUSE_COPROCESSOR1_DISABLED 33
+#define EXCCAUSE_COPROCESSOR2_DISABLED 34
+#define EXCCAUSE_COPROCESSOR3_DISABLED 35
+#define EXCCAUSE_COPROCESSOR4_DISABLED 36
+#define EXCCAUSE_COPROCESSOR5_DISABLED 37
+#define EXCCAUSE_COPROCESSOR6_DISABLED 38
+#define EXCCAUSE_COPROCESSOR7_DISABLED 39
/* PS register fields. */
diff --git a/include/asm-xtensa/sigcontext.h b/include/asm-xtensa/sigcontext.h
index dff3c54..03383af 100644
--- a/include/asm-xtensa/sigcontext.h
+++ b/include/asm-xtensa/sigcontext.h
@@ -22,6 +22,7 @@
unsigned long sc_acclo;
unsigned long sc_acchi;
unsigned long sc_a[16];
+ void *sc_xtregs;
};
#endif /* _XTENSA_SIGCONTEXT_H */
diff --git a/include/asm-xtensa/system.h b/include/asm-xtensa/system.h
index e0cb911..62b1e8f 100644
--- a/include/asm-xtensa/system.h
+++ b/include/asm-xtensa/system.h
@@ -46,42 +46,6 @@
return flags & 0xf;
}
-#define RSR_CPENABLE(x) do { \
- __asm__ __volatile__("rsr %0," __stringify(CPENABLE) : "=a" (x)); \
- } while(0);
-#define WSR_CPENABLE(x) do { \
- __asm__ __volatile__("wsr %0," __stringify(CPENABLE)";rsync" \
- :: "a" (x));} while(0);
-
-#define clear_cpenable() __clear_cpenable()
-
-static inline void __clear_cpenable(void)
-{
-#if XCHAL_HAVE_CP
- unsigned long i = 0;
- WSR_CPENABLE(i);
-#endif
-}
-
-static inline void enable_coprocessor(int i)
-{
-#if XCHAL_HAVE_CP
- int cp;
- RSR_CPENABLE(cp);
- cp |= 1 << i;
- WSR_CPENABLE(cp);
-#endif
-}
-
-static inline void disable_coprocessor(int i)
-{
-#if XCHAL_HAVE_CP
- int cp;
- RSR_CPENABLE(cp);
- cp &= ~(1 << i);
- WSR_CPENABLE(cp);
-#endif
-}
#define smp_read_barrier_depends() do { } while(0)
#define read_barrier_depends() do { } while(0)
@@ -111,7 +75,6 @@
#define switch_to(prev,next,last) \
do { \
- clear_cpenable(); \
(last) = _switch_to(prev, next); \
} while(0)
@@ -244,7 +207,7 @@
"wsr a13," __stringify(SAR) "\n\t"
"wsr a14," __stringify(PS) "\n\t"
:: "a" (&a0), "a" (&ps)
- : "a2", "a3", "a12", "a13", "a14", "a15", "memory");
+ : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", "memory");
}
#define arch_align_stack(x) (x)
diff --git a/include/asm-xtensa/thread_info.h b/include/asm-xtensa/thread_info.h
index 52c9582..a2c6406 100644
--- a/include/asm-xtensa/thread_info.h
+++ b/include/asm-xtensa/thread_info.h
@@ -27,6 +27,21 @@
#ifndef __ASSEMBLY__
+#if XTENSA_HAVE_COPROCESSORS
+
+typedef struct xtregs_coprocessor {
+ xtregs_cp0_t cp0;
+ xtregs_cp1_t cp1;
+ xtregs_cp2_t cp2;
+ xtregs_cp3_t cp3;
+ xtregs_cp4_t cp4;
+ xtregs_cp5_t cp5;
+ xtregs_cp6_t cp6;
+ xtregs_cp7_t cp7;
+} xtregs_coprocessor_t;
+
+#endif
+
struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
@@ -38,7 +53,13 @@
mm_segment_t addr_limit; /* thread address space */
struct restart_block restart_block;
+ unsigned long cpenable;
+ /* Allocate storage for extra user states and coprocessor states. */
+#if XTENSA_HAVE_COPROCESSORS
+ xtregs_coprocessor_t xtregs_cp;
+#endif
+ xtregs_user_t xtregs_user;
};
#else /* !__ASSEMBLY__ */
diff --git a/include/asm-xtensa/variant-fsf/tie-asm.h b/include/asm-xtensa/variant-fsf/tie-asm.h
new file mode 100644
index 0000000..68a73bf
--- /dev/null
+++ b/include/asm-xtensa/variant-fsf/tie-asm.h
@@ -0,0 +1,70 @@
+/*
+ * This header file contains assembly-language definitions (assembly
+ * macros, etc.) for this specific Xtensa processor's TIE extensions
+ * and options. It is customized to this Xtensa processor configuration.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999-2008 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_CORE_TIE_ASM_H
+#define _XTENSA_CORE_TIE_ASM_H
+
+/* Selection parameter values for save-area save/restore macros: */
+/* Option vs. TIE: */
+#define XTHAL_SAS_TIE 0x0001 /* custom extension or coprocessor */
+#define XTHAL_SAS_OPT 0x0002 /* optional (and not a coprocessor) */
+/* Whether used automatically by compiler: */
+#define XTHAL_SAS_NOCC 0x0004 /* not used by compiler w/o special opts/code */
+#define XTHAL_SAS_CC 0x0008 /* used by compiler without special opts/code */
+/* ABI handling across function calls: */
+#define XTHAL_SAS_CALR 0x0010 /* caller-saved */
+#define XTHAL_SAS_CALE 0x0020 /* callee-saved */
+#define XTHAL_SAS_GLOB 0x0040 /* global across function calls (in thread) */
+/* Misc */
+#define XTHAL_SAS_ALL 0xFFFF /* include all default NCP contents */
+
+
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered): ptr (1 byte aligned)
+ * Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+ .macro xchal_ncp_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
+ xchal_sa_start \continue, \ofs
+ .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+ xchal_sa_align \ptr, 0, 1024-4, 4, 4
+ rur \at1, THREADPTR // threadptr option
+ s32i \at1, \ptr, .Lxchal_ofs_ + 0
+ .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
+ .endif
+ .endm // xchal_ncp_store
+
+/* Macro to save all non-coprocessor (extra) custom TIE and optional state
+ * (not including zero-overhead loop registers).
+ * Save area ptr (clobbered): ptr (1 byte aligned)
+ * Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed)
+ */
+ .macro xchal_ncp_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
+ xchal_sa_start \continue, \ofs
+ .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select
+ xchal_sa_align \ptr, 0, 1024-4, 4, 4
+ l32i \at1, \ptr, .Lxchal_ofs_ + 0
+ wur \at1, THREADPTR // threadptr option
+ .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
+ .endif
+ .endm // xchal_ncp_load
+
+
+
+#define XCHAL_NCP_NUM_ATMPS 1
+
+
+#define XCHAL_SA_NUM_ATMPS 1
+
+#endif /*_XTENSA_CORE_TIE_ASM_H*/
+
diff --git a/include/asm-xtensa/variant-fsf/tie.h b/include/asm-xtensa/variant-fsf/tie.h
index a73c716..bf40201 100644
--- a/include/asm-xtensa/variant-fsf/tie.h
+++ b/include/asm-xtensa/variant-fsf/tie.h
@@ -1,22 +1,77 @@
/*
- * Xtensa processor core configuration information.
+ * This header file describes this specific Xtensa processor's TIE extensions
+ * that extend basic Xtensa core functionality. It is customized to this
+ * Xtensa processor configuration.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1999-2006 Tensilica Inc.
+ * Copyright (C) 1999-2007 Tensilica Inc.
*/
-#ifndef XTENSA_TIE_H
-#define XTENSA_TIE_H
-
-/*----------------------------------------------------------------------
- COPROCESSORS and EXTRA STATE
- ----------------------------------------------------------------------*/
+#ifndef _XTENSA_CORE_TIE_H
+#define _XTENSA_CORE_TIE_H
#define XCHAL_CP_NUM 0 /* number of coprocessors */
-#define XCHAL_CP_MASK 0x00
+#define XCHAL_CP_MAX 0 /* max CP ID + 1 (0 if none) */
+#define XCHAL_CP_MASK 0x00 /* bitmask of all CPs by ID */
+#define XCHAL_CP_PORT_MASK 0x00 /* bitmask of only port CPs */
-#endif /*XTENSA_CONFIG_TIE_H*/
+/* Basic parameters of each coprocessor: */
+#define XCHAL_CP7_NAME "XTIOP"
+#define XCHAL_CP7_IDENT XTIOP
+#define XCHAL_CP7_SA_SIZE 0 /* size of state save area */
+#define XCHAL_CP7_SA_ALIGN 1 /* min alignment of save area */
+#define XCHAL_CP_ID_XTIOP 7 /* coprocessor ID (0..7) */
+
+/* Filler info for unassigned coprocessors, to simplify arrays etc: */
+#define XCHAL_NCP_SA_SIZE 0
+#define XCHAL_NCP_SA_ALIGN 1
+#define XCHAL_CP0_SA_SIZE 0
+#define XCHAL_CP0_SA_ALIGN 1
+#define XCHAL_CP1_SA_SIZE 0
+#define XCHAL_CP1_SA_ALIGN 1
+#define XCHAL_CP2_SA_SIZE 0
+#define XCHAL_CP2_SA_ALIGN 1
+#define XCHAL_CP3_SA_SIZE 0
+#define XCHAL_CP3_SA_ALIGN 1
+#define XCHAL_CP4_SA_SIZE 0
+#define XCHAL_CP4_SA_ALIGN 1
+#define XCHAL_CP5_SA_SIZE 0
+#define XCHAL_CP5_SA_ALIGN 1
+#define XCHAL_CP6_SA_SIZE 0
+#define XCHAL_CP6_SA_ALIGN 1
+
+/* Save area for non-coprocessor optional and custom (TIE) state: */
+#define XCHAL_NCP_SA_SIZE 0
+#define XCHAL_NCP_SA_ALIGN 1
+
+/* Total save area for optional and custom state (NCP + CPn): */
+#define XCHAL_TOTAL_SA_SIZE 0 /* with 16-byte align padding */
+#define XCHAL_TOTAL_SA_ALIGN 1 /* actual minimum alignment */
+
+#define XCHAL_NCP_SA_NUM 0
+#define XCHAL_NCP_SA_LIST(s)
+#define XCHAL_CP0_SA_NUM 0
+#define XCHAL_CP0_SA_LIST(s)
+#define XCHAL_CP1_SA_NUM 0
+#define XCHAL_CP1_SA_LIST(s)
+#define XCHAL_CP2_SA_NUM 0
+#define XCHAL_CP2_SA_LIST(s)
+#define XCHAL_CP3_SA_NUM 0
+#define XCHAL_CP3_SA_LIST(s)
+#define XCHAL_CP4_SA_NUM 0
+#define XCHAL_CP4_SA_LIST(s)
+#define XCHAL_CP5_SA_NUM 0
+#define XCHAL_CP5_SA_LIST(s)
+#define XCHAL_CP6_SA_NUM 0
+#define XCHAL_CP6_SA_LIST(s)
+#define XCHAL_CP7_SA_NUM 0
+#define XCHAL_CP7_SA_LIST(s)
+
+/* Byte length of instruction from its first nibble (op0 field), per FLIX. */
+#define XCHAL_OP0_FORMAT_LENGTHS 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
+
+#endif /*_XTENSA_CORE_TIE_H*/