target-xtensa: add fsf core

This is FSF big endian core implemented through linux overlay.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

3 files changed, 384 insertions, 0 deletions

diff --git a/Makefile.target b/Makefile.target
index 95d51ae..9991d88 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -373,6 +373,7 @@ obj-xtensa-y += xtensa_pic.o
 obj-xtensa-y += xtensa_dc232b.o
 obj-xtensa-y += xtensa-semi.o
 obj-xtensa-y += core-dc232b.o
+obj-xtensa-y += core-fsf.o
 
 main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
diff --git a/target-xtensa/core-fsf.c b/target-xtensa/core-fsf.c
new file mode 100644
index 0000000..7650462
--- /dev/null
+++ b/target-xtensa/core-fsf.c
@@ -0,0 +1,22 @@
+#include "cpu.h"
+#include "exec-all.h"
+#include "gdbstub.h"
+#include "qemu-common.h"
+#include "host-utils.h"
+
+#include "core-fsf/core-isa.h"
+#include "overlay_tool.h"
+
+static const XtensaConfig fsf = {
+    .name = "fsf",
+    .options = XTENSA_OPTIONS,
+    /* GDB for this core is not supported currently */
+    .nareg = XCHAL_NUM_AREGS,
+    .ndepc = 1,
+    EXCEPTIONS_SECTION,
+    INTERRUPTS_SECTION,
+    TLB_SECTION,
+    .clock_freq_khz = 10000,
+};
+
+REGISTER_CORE(fsf)
diff --git a/target-xtensa/core-fsf/core-isa.h b/target-xtensa/core-fsf/core-isa.h
new file mode 100644
index 0000000..b519d6c
--- /dev/null
+++ b/target-xtensa/core-fsf/core-isa.h
@@ -0,0 +1,361 @@
+/*
+ * Xtensa processor core configuration information.
+ *
+ * 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.
+ */
+
+#ifndef _XTENSA_CORE_H
+#define _XTENSA_CORE_H
+
+
+/****************************************************************************
+            Parameters Useful for Any Code, USER or PRIVILEGED
+ ****************************************************************************/
+
+/*
+ *  Note:  Macros of the form XCHAL_HAVE_*** have a value of 1 if the option is
+ *  configured, and a value of 0 otherwise.  These macros are always defined.
+ */
+
+
+/*----------------------------------------------------------------------
+                                ISA
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_BE                   1       /* big-endian byte ordering */
+#define XCHAL_HAVE_WINDOWED             1       /* windowed registers option */
+#define XCHAL_NUM_AREGS                 64      /* num of physical addr regs */
+#define XCHAL_NUM_AREGS_LOG2            6       /* log2(XCHAL_NUM_AREGS) */
+#define XCHAL_MAX_INSTRUCTION_SIZE      3       /* max instr bytes (3..8) */
+#define XCHAL_HAVE_DEBUG                1       /* debug option */
+#define XCHAL_HAVE_DENSITY              1       /* 16-bit instructions */
+#define XCHAL_HAVE_LOOPS                1       /* zero-overhead loops */
+#define XCHAL_HAVE_NSA                  1       /* NSA/NSAU instructions */
+#define XCHAL_HAVE_MINMAX               0       /* MIN/MAX instructions */
+#define XCHAL_HAVE_SEXT                 0       /* SEXT instruction */
+#define XCHAL_HAVE_CLAMPS               0       /* CLAMPS instruction */
+#define XCHAL_HAVE_MUL16                0       /* MUL16S/MUL16U instructions */
+#define XCHAL_HAVE_MUL32                0       /* MULL instruction */
+#define XCHAL_HAVE_MUL32_HIGH           0       /* MULUH/MULSH instructions */
+#define XCHAL_HAVE_L32R                 1       /* L32R instruction */
+#define XCHAL_HAVE_ABSOLUTE_LITERALS    1       /* non-PC-rel (extended) L32R */
+#define XCHAL_HAVE_CONST16              0       /* CONST16 instruction */
+#define XCHAL_HAVE_ADDX                 1       /* ADDX#/SUBX# instructions */
+#define XCHAL_HAVE_WIDE_BRANCHES        0       /* B*.W18 or B*.W15 instr's */
+#define XCHAL_HAVE_PREDICTED_BRANCHES   0       /* B[EQ/EQZ/NE/NEZ]T instr's */
+#define XCHAL_HAVE_CALL4AND12           1       /* (obsolete option) */
+#define XCHAL_HAVE_ABS                  1       /* ABS instruction */
+/*#define XCHAL_HAVE_POPC               0*/     /* POPC instruction */
+/*#define XCHAL_HAVE_CRC                0*/     /* CRC instruction */
+#define XCHAL_HAVE_RELEASE_SYNC         0       /* L32AI/S32RI instructions */
+#define XCHAL_HAVE_S32C1I               0       /* S32C1I instruction */
+#define XCHAL_HAVE_SPECULATION          0       /* speculation */
+#define XCHAL_HAVE_FULL_RESET           1       /* all regs/state reset */
+#define XCHAL_NUM_CONTEXTS              1       /* */
+#define XCHAL_NUM_MISC_REGS             2       /* num of scratch regs (0..4) */
+#define XCHAL_HAVE_TAP_MASTER           0       /* JTAG TAP control instr's */
+#define XCHAL_HAVE_PRID                 1       /* processor ID register */
+#define XCHAL_HAVE_THREADPTR            1       /* THREADPTR register */
+#define XCHAL_HAVE_BOOLEANS             0       /* boolean registers */
+#define XCHAL_HAVE_CP                   0       /* CPENABLE reg (coprocessor) */
+#define XCHAL_CP_MAXCFG                 0       /* max allowed cp id plus one */
+#define XCHAL_HAVE_MAC16                0       /* MAC16 package */
+#define XCHAL_HAVE_VECTORFPU2005        0       /* vector floating-point pkg */
+#define XCHAL_HAVE_FP                   0       /* floating point pkg */
+#define XCHAL_HAVE_VECTRA1              0       /* Vectra I  pkg */
+#define XCHAL_HAVE_VECTRALX             0       /* Vectra LX pkg */
+#define XCHAL_HAVE_HIFI2                0       /* HiFi2 Audio Engine pkg */
+
+
+/*----------------------------------------------------------------------
+                                MISC
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_WRITEBUFFER_ENTRIES   4       /* size of write buffer */
+#define XCHAL_INST_FETCH_WIDTH          4       /* instr-fetch width in bytes */
+#define XCHAL_DATA_WIDTH                4       /* data width in bytes */
+/*  In T1050, applies to selected core load and store instructions (see ISA): */
+#define XCHAL_UNALIGNED_LOAD_EXCEPTION  1       /* unaligned loads cause exc. */
+#define XCHAL_UNALIGNED_STORE_EXCEPTION 1       /* unaligned stores cause exc.*/
+
+#define XCHAL_SW_VERSION                800002  /* sw version of this header */
+
+#define XCHAL_CORE_ID                   "fsf"   /* alphanum core name
+                                                   (CoreID) set in the Xtensa
+                                                   Processor Generator */
+
+#define XCHAL_CORE_DESCRIPTION          "fsf standard core"
+#define XCHAL_BUILD_UNIQUE_ID           0x00006700      /* 22-bit sw build ID */
+
+/*
+ *  These definitions describe the hardware targeted by this software.
+ */
+#define XCHAL_HW_CONFIGID0              0xC103C3FF      /* ConfigID hi 32 bits*/
+#define XCHAL_HW_CONFIGID1              0x0C006700      /* ConfigID lo 32 bits*/
+#define XCHAL_HW_VERSION_NAME           "LX2.0.0"       /* full version name */
+#define XCHAL_HW_VERSION_MAJOR          2200    /* major ver# of targeted hw */
+#define XCHAL_HW_VERSION_MINOR          0       /* minor ver# of targeted hw */
+#define XTHAL_HW_REL_LX2                1
+#define XTHAL_HW_REL_LX2_0              1
+#define XTHAL_HW_REL_LX2_0_0            1
+#define XCHAL_HW_CONFIGID_RELIABLE      1
+/*  If software targets a *range* of hardware versions, these are the bounds: */
+#define XCHAL_HW_MIN_VERSION_MAJOR      2200    /* major v of earliest tgt hw */
+#define XCHAL_HW_MIN_VERSION_MINOR      0       /* minor v of earliest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MAJOR      2200    /* major v of latest tgt hw */
+#define XCHAL_HW_MAX_VERSION_MINOR      0       /* minor v of latest tgt hw */
+
+
+/*----------------------------------------------------------------------
+                                CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_ICACHE_LINESIZE           16      /* I-cache line size in bytes */
+#define XCHAL_DCACHE_LINESIZE           16      /* D-cache line size in bytes */
+#define XCHAL_ICACHE_LINEWIDTH          4       /* log2(I line size in bytes) */
+#define XCHAL_DCACHE_LINEWIDTH          4       /* log2(D line size in bytes) */
+
+#define XCHAL_ICACHE_SIZE               8192    /* I-cache size in bytes or 0 */
+#define XCHAL_DCACHE_SIZE               8192    /* D-cache size in bytes or 0 */
+
+#define XCHAL_DCACHE_IS_WRITEBACK       0       /* writeback feature */
+
+
+
+
+/****************************************************************************
+    Parameters Useful for PRIVILEGED (Supervisory or Non-Virtualized) Code
+ ****************************************************************************/
+
+
+#ifndef XTENSA_HAL_NON_PRIVILEGED_ONLY
+
+/*----------------------------------------------------------------------
+                                CACHE
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_PIF                  1       /* any outbound PIF present */
+
+/*  If present, cache size in bytes == (ways * 2^(linewidth + setwidth)).  */
+
+/*  Number of cache sets in log2(lines per way):  */
+#define XCHAL_ICACHE_SETWIDTH           8
+#define XCHAL_DCACHE_SETWIDTH           8
+
+/*  Cache set associativity (number of ways):  */
+#define XCHAL_ICACHE_WAYS               2
+#define XCHAL_DCACHE_WAYS               2
+
+/*  Cache features:  */
+#define XCHAL_ICACHE_LINE_LOCKABLE      0
+#define XCHAL_DCACHE_LINE_LOCKABLE      0
+#define XCHAL_ICACHE_ECC_PARITY         0
+#define XCHAL_DCACHE_ECC_PARITY         0
+
+/*  Number of encoded cache attr bits (see <xtensa/hal.h> for decoded bits):  */
+#define XCHAL_CA_BITS                   4
+
+
+/*----------------------------------------------------------------------
+                        INTERNAL I/D RAM/ROMs and XLMI
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_NUM_INSTROM               0       /* number of core instr. ROMs */
+#define XCHAL_NUM_INSTRAM               0       /* number of core instr. RAMs */
+#define XCHAL_NUM_DATAROM               0       /* number of core data ROMs */
+#define XCHAL_NUM_DATARAM               0       /* number of core data RAMs */
+#define XCHAL_NUM_URAM                  0       /* number of core unified RAMs*/
+#define XCHAL_NUM_XLMI                  0       /* number of core XLMI ports */
+
+
+/*----------------------------------------------------------------------
+                        INTERRUPTS and TIMERS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_INTERRUPTS           1       /* interrupt option */
+#define XCHAL_HAVE_HIGHPRI_INTERRUPTS   1       /* med/high-pri. interrupts */
+#define XCHAL_HAVE_NMI                  0       /* non-maskable interrupt */
+#define XCHAL_HAVE_CCOUNT               1       /* CCOUNT reg. (timer option) */
+#define XCHAL_NUM_TIMERS                3       /* number of CCOMPAREn regs */
+#define XCHAL_NUM_INTERRUPTS            17      /* number of interrupts */
+#define XCHAL_NUM_INTERRUPTS_LOG2       5       /* ceil(log2(NUM_INTERRUPTS)) */
+#define XCHAL_NUM_EXTINTERRUPTS         10      /* num of external interrupts */
+#define XCHAL_NUM_INTLEVELS             4       /* number of interrupt levels
+                                                   (not including level zero) */
+#define XCHAL_EXCM_LEVEL                1       /* level masked by PS.EXCM */
+        /* (always 1 in XEA1; levels 2 .. EXCM_LEVEL are "medium priority") */
+
+/*  Masks of interrupts at each interrupt level:  */
+#define XCHAL_INTLEVEL1_MASK            0x000064F9
+#define XCHAL_INTLEVEL2_MASK            0x00008902
+#define XCHAL_INTLEVEL3_MASK            0x00011204
+#define XCHAL_INTLEVEL4_MASK            0x00000000
+#define XCHAL_INTLEVEL5_MASK            0x00000000
+#define XCHAL_INTLEVEL6_MASK            0x00000000
+#define XCHAL_INTLEVEL7_MASK            0x00000000
+
+/*  Masks of interrupts at each range 1..n of interrupt levels:  */
+#define XCHAL_INTLEVEL1_ANDBELOW_MASK   0x000064F9
+#define XCHAL_INTLEVEL2_ANDBELOW_MASK   0x0000EDFB
+#define XCHAL_INTLEVEL3_ANDBELOW_MASK   0x0001FFFF
+#define XCHAL_INTLEVEL4_ANDBELOW_MASK   0x0001FFFF
+#define XCHAL_INTLEVEL5_ANDBELOW_MASK   0x0001FFFF
+#define XCHAL_INTLEVEL6_ANDBELOW_MASK   0x0001FFFF
+#define XCHAL_INTLEVEL7_ANDBELOW_MASK   0x0001FFFF
+
+/*  Level of each interrupt:  */
+#define XCHAL_INT0_LEVEL                1
+#define XCHAL_INT1_LEVEL                2
+#define XCHAL_INT2_LEVEL                3
+#define XCHAL_INT3_LEVEL                1
+#define XCHAL_INT4_LEVEL                1
+#define XCHAL_INT5_LEVEL                1
+#define XCHAL_INT6_LEVEL                1
+#define XCHAL_INT7_LEVEL                1
+#define XCHAL_INT8_LEVEL                2
+#define XCHAL_INT9_LEVEL                3
+#define XCHAL_INT10_LEVEL               1
+#define XCHAL_INT11_LEVEL               2
+#define XCHAL_INT12_LEVEL               3
+#define XCHAL_INT13_LEVEL               1
+#define XCHAL_INT14_LEVEL               1
+#define XCHAL_INT15_LEVEL               2
+#define XCHAL_INT16_LEVEL               3
+#define XCHAL_DEBUGLEVEL                4       /* debug interrupt level */
+#define XCHAL_HAVE_DEBUG_EXTERN_INT     0       /* OCD external db interrupt */
+
+/*  Type of each interrupt:  */
+#define XCHAL_INT0_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT1_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT2_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT3_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT4_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT5_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT6_TYPE         XTHAL_INTTYPE_EXTERN_LEVEL
+#define XCHAL_INT7_TYPE         XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT8_TYPE         XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT9_TYPE         XTHAL_INTTYPE_EXTERN_EDGE
+#define XCHAL_INT10_TYPE        XTHAL_INTTYPE_TIMER
+#define XCHAL_INT11_TYPE        XTHAL_INTTYPE_TIMER
+#define XCHAL_INT12_TYPE        XTHAL_INTTYPE_TIMER
+#define XCHAL_INT13_TYPE        XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT14_TYPE        XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT15_TYPE        XTHAL_INTTYPE_SOFTWARE
+#define XCHAL_INT16_TYPE        XTHAL_INTTYPE_SOFTWARE
+
+/*  Masks of interrupts for each type of interrupt:  */
+#define XCHAL_INTTYPE_MASK_UNCONFIGURED 0xFFFE0000
+#define XCHAL_INTTYPE_MASK_SOFTWARE     0x0001E000
+#define XCHAL_INTTYPE_MASK_EXTERN_EDGE  0x00000380
+#define XCHAL_INTTYPE_MASK_EXTERN_LEVEL 0x0000007F
+#define XCHAL_INTTYPE_MASK_TIMER        0x00001C00
+#define XCHAL_INTTYPE_MASK_NMI          0x00000000
+#define XCHAL_INTTYPE_MASK_WRITE_ERROR  0x00000000
+
+/*  Interrupt numbers assigned to specific interrupt sources:  */
+#define XCHAL_TIMER0_INTERRUPT          10      /* CCOMPARE0 */
+#define XCHAL_TIMER1_INTERRUPT          11      /* CCOMPARE1 */
+#define XCHAL_TIMER2_INTERRUPT          12      /* CCOMPARE2 */
+#define XCHAL_TIMER3_INTERRUPT          XTHAL_TIMER_UNCONFIGURED
+
+/*  Interrupt numbers for levels at which only one interrupt is configured:  */
+/*  (There are many interrupts each at level(s) 1, 2, 3.)  */
+
+
+/*
+ *  External interrupt vectors/levels.
+ *  These macros describe how Xtensa processor interrupt numbers
+ *  (as numbered internally, eg. in INTERRUPT and INTENABLE registers)
+ *  map to external BInterrupt<n> pins, for those interrupts
+ *  configured as external (level-triggered, edge-triggered, or NMI).
+ *  See the Xtensa processor databook for more details.
+ */
+
+/*  Core interrupt numbers mapped to each EXTERNAL interrupt number:  */
+#define XCHAL_EXTINT0_NUM               0       /* (intlevel 1) */
+#define XCHAL_EXTINT1_NUM               1       /* (intlevel 2) */
+#define XCHAL_EXTINT2_NUM               2       /* (intlevel 3) */
+#define XCHAL_EXTINT3_NUM               3       /* (intlevel 1) */
+#define XCHAL_EXTINT4_NUM               4       /* (intlevel 1) */
+#define XCHAL_EXTINT5_NUM               5       /* (intlevel 1) */
+#define XCHAL_EXTINT6_NUM               6       /* (intlevel 1) */
+#define XCHAL_EXTINT7_NUM               7       /* (intlevel 1) */
+#define XCHAL_EXTINT8_NUM               8       /* (intlevel 2) */
+#define XCHAL_EXTINT9_NUM               9       /* (intlevel 3) */
+
+
+/*----------------------------------------------------------------------
+                        EXCEPTIONS and VECTORS
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_XEA_VERSION               2       /* Xtensa Exception Architecture
+                                                   number: 1 == XEA1 (old)
+                                                           2 == XEA2 (new)
+                                                           0 == XEAX (extern) */
+#define XCHAL_HAVE_XEA1                 0       /* Exception Architecture 1 */
+#define XCHAL_HAVE_XEA2                 1       /* Exception Architecture 2 */
+#define XCHAL_HAVE_XEAX                 0       /* External Exception Arch. */
+#define XCHAL_HAVE_EXCEPTIONS           1       /* exception option */
+#define XCHAL_HAVE_MEM_ECC_PARITY       0       /* local memory ECC/parity */
+
+#define XCHAL_RESET_VECTOR_VADDR        0xFE000020
+#define XCHAL_RESET_VECTOR_PADDR        0xFE000020
+#define XCHAL_USER_VECTOR_VADDR         0xD0000220
+#define XCHAL_USER_VECTOR_PADDR         0x00000220
+#define XCHAL_KERNEL_VECTOR_VADDR       0xD0000200
+#define XCHAL_KERNEL_VECTOR_PADDR       0x00000200
+#define XCHAL_DOUBLEEXC_VECTOR_VADDR    0xD0000290
+#define XCHAL_DOUBLEEXC_VECTOR_PADDR    0x00000290
+#define XCHAL_WINDOW_VECTORS_VADDR      0xD0000000
+#define XCHAL_WINDOW_VECTORS_PADDR      0x00000000
+#define XCHAL_INTLEVEL2_VECTOR_VADDR    0xD0000240
+#define XCHAL_INTLEVEL2_VECTOR_PADDR    0x00000240
+#define XCHAL_INTLEVEL3_VECTOR_VADDR    0xD0000250
+#define XCHAL_INTLEVEL3_VECTOR_PADDR    0x00000250
+#define XCHAL_INTLEVEL4_VECTOR_VADDR    0xFE000520
+#define XCHAL_INTLEVEL4_VECTOR_PADDR    0xFE000520
+#define XCHAL_DEBUG_VECTOR_VADDR        XCHAL_INTLEVEL4_VECTOR_VADDR
+#define XCHAL_DEBUG_VECTOR_PADDR        XCHAL_INTLEVEL4_VECTOR_PADDR
+
+
+/*----------------------------------------------------------------------
+                                DEBUG
+  ----------------------------------------------------------------------*/
+
+#define XCHAL_HAVE_OCD                  1       /* OnChipDebug option */
+#define XCHAL_NUM_IBREAK                2       /* number of IBREAKn regs */
+#define XCHAL_NUM_DBREAK                2       /* number of DBREAKn regs */
+#define XCHAL_HAVE_OCD_DIR_ARRAY        1       /* faster OCD option */
+
+
+/*----------------------------------------------------------------------
+                                MMU
+  ----------------------------------------------------------------------*/
+
+/*  See <xtensa/config/core-matmap.h> header file for more details.  */
+
+#define XCHAL_HAVE_TLBS                 1       /* inverse of HAVE_CACHEATTR */
+#define XCHAL_HAVE_SPANNING_WAY         0       /* one way maps I+D 4GB vaddr */
+#define XCHAL_HAVE_IDENTITY_MAP         0       /* vaddr == paddr always */
+#define XCHAL_HAVE_CACHEATTR            0       /* CACHEATTR register present */
+#define XCHAL_HAVE_MIMIC_CACHEATTR      0       /* region protection */
+#define XCHAL_HAVE_XLT_CACHEATTR        0       /* region prot. w/translation */
+#define XCHAL_HAVE_PTP_MMU              1       /* full MMU (with page table
+                                                   [autorefill] and protection)
+                                                   usable for an MMU-based OS */
+/*  If none of the above last 4 are set, it's a custom TLB configuration.  */
+#define XCHAL_ITLB_ARF_ENTRIES_LOG2     2       /* log2(autorefill way size) */
+#define XCHAL_DTLB_ARF_ENTRIES_LOG2     2       /* log2(autorefill way size) */
+
+#define XCHAL_MMU_ASID_BITS             8       /* number of bits in ASIDs */
+#define XCHAL_MMU_RINGS                 4       /* number of rings (1..4) */
+#define XCHAL_MMU_RING_BITS             2       /* num of bits in RING field */
+
+#endif /* !XTENSA_HAL_NON_PRIVILEGED_ONLY */
+
+
+#endif /* _XTENSA_CORE_CONFIGURATION_H */