From f63036b811550ef12ab849ab55b35cd92403fda1 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 21 Apr 2015 02:55:29 -0400 Subject: [PATCH] sim: mcore: convert to common memory/verbose functions Re-use the existing memory core that handles reads/writes. The verbose command is converted to the common --verbose flag since only a few call sites use it now. --- sim/mcore/ChangeLog | 25 ++++ sim/mcore/interp.c | 353 +++++--------------------------------------- 2 files changed, 59 insertions(+), 319 deletions(-) diff --git a/sim/mcore/ChangeLog b/sim/mcore/ChangeLog index 20c6f773eef..5c27851db6a 100644 --- a/sim/mcore/ChangeLog +++ b/sim/mcore/ChangeLog @@ -1,3 +1,28 @@ +2015-04-21 Mike Frysinger + + * interp.c (mcore_regset): Delete msize & memory. + (issue_messages, mem, wbat, what, wlat, rbat, what, wlat, + sim_memory_size, MEM_SIZE_FLOOR, sim_size, init_pointers): Delete. + (DEFAULT_MEMORY_SIZE): Define. + (set_initial_gprs): Delete memsize handling and call to init_pointers. + Change cpu.asregs.msize to DEFAULT_MEMORY_SIZE. + (syscall_read_mem): Change memcpy to sim_core_read_buffer. + (syscall_write_mem): Change memcpy to sim_core_write_buffer. + (process_stub): Change issue_messages to STATE_VERBOSE_P. + (util): Turn printf into a stub. Change issue_messages to + STATE_VERBOSE_P. + (rbat, rhat, rlat, wbat, what, wlat): Define to sim core funcs. + (sim_resume): Change issue_messages to STATE_VERBOSE_P. + Delete cpu.asregs.msize range checks. + (sim_write, sim_read): Delete. + (sim_store_register, sim_fetch_register): Delete call to + init_pointers. + (sim_open): Delete osize, call to sim_size, and issue_messages. Call + sim_do_commandf to setup memory. + (sim_create_inferior): Delete issue_messages handling. Change + cpu.asregs.msize to DEFAULT_MEMORY_SIZE. Change strcpy to + sim_core_write_buffer. + 2015-04-21 Mike Frysinger * interp.c (WATCHFUNCTIONS): Undef it. diff --git a/sim/mcore/interp.c b/sim/mcore/interp.c index b837ecf3875..cd493ed1a4e 100644 --- a/sim/mcore/interp.c +++ b/sim/mcore/interp.c @@ -113,8 +113,6 @@ struct mcore_regset int cycles; int insts; int exception; - unsigned long msize; - unsigned char * memory; word * active_gregs; }; @@ -129,8 +127,6 @@ union static int memcycles = 1; -static int issue_messages = 0; - #define gr asregs.active_gregs #define cr asregs.cregs #define sr asregs.cregs[0] @@ -146,7 +142,6 @@ static int issue_messages = 0; #define ss4 asregs.cregs[10] #define gcr asregs.cregs[11] #define gsr asregs.cregs[12] -#define mem asregs.memory /* maniuplate the carry bit */ #define C_ON() (cpu.sr & 1) @@ -165,243 +160,19 @@ static int issue_messages = 0; #define PARM4 5 #define RET1 2 /* register for return values. */ -static void -wbat (word x, word v) -{ - if (((uword)x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "byte write to 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - } - else - { - unsigned char *p = cpu.mem + x; - p[0] = v; - } -} - -static void -wlat (word x, word v) -{ - if (((uword)x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "word write to 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - } - else - { - if ((x & 3) != 0) - { - if (issue_messages) - fprintf (stderr, "word write to unaligned memory address: 0x%x\n", x); - - cpu.asregs.exception = SIGBUS; - } - else if (! target_big_endian) - { - unsigned char * p = cpu.mem + x; - p[3] = v >> 24; - p[2] = v >> 16; - p[1] = v >> 8; - p[0] = v; - } - else - { - unsigned char * p = cpu.mem + x; - p[0] = v >> 24; - p[1] = v >> 16; - p[2] = v >> 8; - p[3] = v; - } - } -} - -static void -what (word x, word v) -{ - if (((uword)x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "short write to 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - } - else - { - if ((x & 1) != 0) - { - if (issue_messages) - fprintf (stderr, "short write to unaligned memory address: 0x%x\n", - x); - - cpu.asregs.exception = SIGBUS; - } - else if (! target_big_endian) - { - unsigned char * p = cpu.mem + x; - p[1] = v >> 8; - p[0] = v; - } - else - { - unsigned char * p = cpu.mem + x; - p[0] = v >> 8; - p[1] = v; - } - } -} - -/* Read functions. */ -static int -rbat (word x) -{ - if (((uword)x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "byte read from 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - return 0; - } - else - { - unsigned char * p = cpu.mem + x; - return p[0]; - } -} - -static int -rlat (word x) -{ - if (((uword) x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "word read from 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - return 0; - } - else - { - if ((x & 3) != 0) - { - if (issue_messages) - fprintf (stderr, "word read from unaligned address: 0x%x\n", x); - - cpu.asregs.exception = SIGBUS; - return 0; - } - else if (! target_big_endian) - { - unsigned char * p = cpu.mem + x; - return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]; - } - else - { - unsigned char * p = cpu.mem + x; - return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; - } - } -} - -static int -rhat (word x) -{ - if (((uword)x) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "short read from 0x%x outside memory range\n", x); - - cpu.asregs.exception = SIGSEGV; - return 0; - } - else - { - if ((x & 1) != 0) - { - if (issue_messages) - fprintf (stderr, "short read from unaligned address: 0x%x\n", x); - - cpu.asregs.exception = SIGBUS; - return 0; - } - else if (! target_big_endian) - { - unsigned char * p = cpu.mem + x; - return (p[1] << 8) | p[0]; - } - else - { - unsigned char * p = cpu.mem + x; - return (p[0] << 8) | p[1]; - } - } -} - - /* Default to a 8 Mbyte (== 2^23) memory space. */ -/* TODO: Delete all this custom memory logic and move to common sim helpers. */ -static int sim_memory_size = 23; - -#define MEM_SIZE_FLOOR 64 -static void -sim_size (int power) -{ - sim_memory_size = power; - cpu.asregs.msize = 1 << sim_memory_size; - - if (cpu.mem) - free (cpu.mem); - - /* Watch out for the '0 count' problem. There's probably a better - way.. e.g., why do we use 64 here? */ - if (cpu.asregs.msize < 64) /* Ensure a boundary. */ - cpu.mem = (unsigned char *) calloc (64, (64 + cpu.asregs.msize) / 64); - else - cpu.mem = (unsigned char *) calloc (64, cpu.asregs.msize / 64); - - if (!cpu.mem) - { - if (issue_messages) - fprintf (stderr, - "Not enough VM for simulation of %lu bytes of RAM\n", - cpu.asregs.msize); - - cpu.asregs.msize = 1; - cpu.mem = (unsigned char *) calloc (1, 1); - } -} - -static void -init_pointers (void) -{ - if (cpu.asregs.msize != (1 << sim_memory_size)) - sim_size (sim_memory_size); -} +#define DEFAULT_MEMORY_SIZE 0x800000 static void set_initial_gprs (SIM_CPU *scpu) { int i; long space; - unsigned long memsize; - - init_pointers (); /* Set up machine just out of reset. */ CPU_PC_SET (scpu, 0); cpu.sr = 0; - memsize = cpu.asregs.msize / (1024 * 1024); - - if (issue_messages > 1) - fprintf (stderr, "Simulated memory of %lu Mbytes (0x0 .. 0x%08lx)\n", - memsize, cpu.asregs.msize - 1); - /* Clean out the GPRs and alternate GPRs. */ for (i = 0; i < 16; i++) { @@ -416,7 +187,7 @@ set_initial_gprs (SIM_CPU *scpu) cpu.asregs.active_gregs = &cpu.asregs.gregs[0]; /* ABI specifies initial values for these registers. */ - cpu.gr[0] = cpu.asregs.msize - 4; + cpu.gr[0] = DEFAULT_MEMORY_SIZE - 4; /* dac fix, the stack address must be 8-byte aligned! */ cpu.gr[0] = cpu.gr[0] - cpu.gr[0] % 8; @@ -432,16 +203,20 @@ static int syscall_read_mem (host_callback *cb, struct cb_syscall *sc, unsigned long taddr, char *buf, int bytes) { - memcpy (buf, cpu.mem + taddr, bytes); - return bytes; + SIM_DESC sd = (SIM_DESC) sc->p1; + SIM_CPU *cpu = (SIM_CPU *) sc->p2; + + return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes); } static int syscall_write_mem (host_callback *cb, struct cb_syscall *sc, unsigned long taddr, const char *buf, int bytes) { - memcpy (cpu.mem + taddr, buf, bytes); - return bytes; + SIM_DESC sd = (SIM_DESC) sc->p1; + SIM_CPU *cpu = (SIM_CPU *) sc->p2; + + return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes); } /* Simulate a monitor trap. */ @@ -489,7 +264,7 @@ process_stub (SIM_DESC sd, int what) break; default: - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "Unhandled stub opcode: %d\n", what); break; } @@ -505,31 +280,12 @@ util (SIM_DESC sd, unsigned what) break; case 1: /* printf */ - { - unsigned long a[6]; - unsigned char *s; - int i; - - a[0] = (unsigned long)(cpu.mem + cpu.gr[PARM1]); - - for (s = (unsigned char *)a[0], i = 1 ; *s && i < 6 ; s++) - { - if (*s == '%') - { - if (*++s == 's') - a[i] = (unsigned long)(cpu.mem + cpu.gr[PARM1+i]); - else - a[i] = cpu.gr[i+PARM1]; - i++; - } - } - - cpu.gr[RET1] = printf ((char *)a[0], a[1], a[2], a[3], a[4], a[5]); - } + if (STATE_VERBOSE_P (sd)) + fprintf (stderr, "WARNING: printf unimplemented\n"); break; case 2: /* scanf */ - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "WARNING: scanf unimplemented\n"); break; @@ -542,7 +298,7 @@ util (SIM_DESC sd, unsigned what) break; default: - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "Unhandled util code: %x\n", what); break; } @@ -586,6 +342,13 @@ int WLW; #define IMM5 ((inst >> 4) & 0x1F) #define IMM4 ((inst) & 0xF) +#define rbat(X) sim_core_read_1 (scpu, 0, read_map, X) +#define rhat(X) sim_core_read_2 (scpu, 0, read_map, X) +#define rlat(X) sim_core_read_4 (scpu, 0, read_map, X) +#define wbat(X, D) sim_core_write_1 (scpu, 0, write_map, X, D) +#define what(X, D) sim_core_write_2 (scpu, 0, write_map, X, D) +#define wlat(X, D) sim_core_write_4 (scpu, 0, write_map, X, D) + static int tracing = 0; void @@ -751,17 +514,17 @@ sim_resume (SIM_DESC sd, int step, int siggnal) break; case 0x4: /* stop */ - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "WARNING: stop unimplemented\n"); break; case 0x5: /* wait */ - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "WARNING: wait unimplemented\n"); break; case 0x6: /* doze */ - if (issue_messages) + if (STATE_VERBOSE_P (sd)) fprintf (stderr, "WARNING: doze unimplemented\n"); break; @@ -1522,19 +1285,8 @@ sim_resume (SIM_DESC sd, int step, int siggnal) if (needfetch) { - /* Do not let him fetch from a bad address! */ - if (((uword)pc) >= cpu.asregs.msize) - { - if (issue_messages) - fprintf (stderr, "PC loaded at 0x%x is outside of available memory! (0x%x)\n", oldpc, pc); - - cpu.asregs.exception = SIGSEGV; - } - else - { - ibuf = rlat (pc & 0xFFFFFFFC); - needfetch = 0; - } + ibuf = rlat (pc & 0xFFFFFFFC); + needfetch = 0; } } while (!cpu.asregs.exception); @@ -1547,35 +1299,9 @@ sim_resume (SIM_DESC sd, int step, int siggnal) cpu.asregs.cycles += memops * memcycles; /* and memop cycle delays */ } - -int -sim_write (SIM_DESC sd, SIM_ADDR addr, const unsigned char *buffer, int size) -{ - int i; - init_pointers (); - - memcpy (& cpu.mem[addr], buffer, size); - - return size; -} - -int -sim_read (SIM_DESC sd, SIM_ADDR addr, unsigned char *buffer, int size) -{ - int i; - init_pointers (); - - memcpy (buffer, & cpu.mem[addr], size); - - return size; -} - - int sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length) { - init_pointers (); - if (rn < NUM_MCORE_REGS && rn >= 0) { if (length == 4) @@ -1596,8 +1322,6 @@ sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length) int sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length) { - init_pointers (); - if (rn < NUM_MCORE_REGS && rn >= 0) { if (length == 4) @@ -1695,8 +1419,8 @@ free_state (SIM_DESC sd) SIM_DESC sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv) { + int i; SIM_DESC sd = sim_state_alloc (kind, cb); - int i, osize; SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); /* The cpu data is kept in a separately allocated chunk of memory. */ @@ -1747,15 +1471,6 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv) return 0; } - osize = sim_memory_size; - - if (kind == SIM_OPEN_STANDALONE) - issue_messages = 1; - - /* Discard and reacquire memory -- start with a clean slate. */ - sim_size (1); /* small */ - sim_size (osize); /* and back again */ - /* CPU specific initialization. */ for (i = 0; i < MAX_NR_PROCESSORS; ++i) { @@ -1767,6 +1482,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv) set_initial_gprs (cpu); /* Reset the GPR registers. */ } + /* Default to a 8 Mbyte (== 2^23) memory space. */ + sim_do_commandf (sd, "memory-size %#x", DEFAULT_MEMORY_SIZE); + return sd; } @@ -1791,12 +1509,9 @@ sim_create_inferior (SIM_DESC sd, struct bfd *prog_bfd, char **argv, char **env) /* Set the initial register set. */ - l = issue_messages; - issue_messages = 0; set_initial_gprs (scpu); - issue_messages = l; - hi_stack = cpu.asregs.msize - 4; + hi_stack = DEFAULT_MEMORY_SIZE - 4; CPU_PC_SET (scpu, bfd_get_start_address (prog_bfd)); /* Calculate the argument and environment strings. */ @@ -1848,7 +1563,7 @@ sim_create_inferior (SIM_DESC sd, struct bfd *prog_bfd, char **argv, char **env) /* Copy the string. */ l = strlen (* avp) + 1; - strcpy ((char *)(cpu.mem + strings), *avp); + sim_core_write_buffer (sd, scpu, write_map, *avp, strings, l); /* Bump the pointers. */ avp++; @@ -1879,7 +1594,7 @@ sim_create_inferior (SIM_DESC sd, struct bfd *prog_bfd, char **argv, char **env) /* Copy the string. */ l = strlen (* avp) + 1; - strcpy ((char *)(cpu.mem + strings), *avp); + sim_core_write_buffer (sd, scpu, write_map, *avp, strings, l); /* Bump the pointers. */ avp++; -- 2.30.2