[Xen-changelog] [xen-3.1-testing] ioemu: save 3MB of ioport tables (on 64bit machines)

["Xen patchbot-3.1-testing" <patchbot-3.1-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1203344614 0
# Node ID 6bec8050d3a29296e99eea26bc41cde6b0e806df
# Parent  5bcd419017912d94a188aa1f67077a91dfba7973
ioemu: save 3MB of ioport tables (on 64bit machines)
by keeping then initialized to NULL and check for it in the handlers.

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
xen-unstable changeset:   17019:7e189fc27f4ffd0bfcb1727dbbf3b06a1a515705
xen-unstable date:        Mon Feb 11 14:47:19 2008 +0000
---
 tools/ioemu/vl.c |   60 ++++++++++++++++++++++++++++++++++++-------------------
 1 files changed, 40 insertions(+), 20 deletions(-)

diff -r 5bcd41901791 -r 6bec8050d3a2 tools/ioemu/vl.c
--- a/tools/ioemu/vl.c  Mon Feb 18 14:21:51 2008 +0000
+++ b/tools/ioemu/vl.c  Mon Feb 18 14:23:34 2008 +0000
@@ -200,17 +200,29 @@ uint32_t default_ioport_readw(void *opaq
 uint32_t default_ioport_readw(void *opaque, uint32_t address)
 {
     uint32_t data;
-    data = ioport_read_table[0][address](ioport_opaque[address], address);
+    IOPortReadFunc *func = ioport_read_table[0][address];
+    if (!func)
+           func = default_ioport_readb;
+    data = func(ioport_opaque[address], address);
     address = (address + 1) & (MAX_IOPORTS - 1);
-    data |= ioport_read_table[0][address](ioport_opaque[address], address) << 
8;
+    func = ioport_read_table[0][address];
+    if (!func)
+           func = default_ioport_readb;
+    data |= func(ioport_opaque[address], address) << 8;
     return data;
 }
 
 void default_ioport_writew(void *opaque, uint32_t address, uint32_t data)
 {
-    ioport_write_table[0][address](ioport_opaque[address], address, data & 
0xff);
+    IOPortWriteFunc *func = ioport_write_table[0][address];
+    if (!func)
+           func = default_ioport_writeb;
+    func(ioport_opaque[address], address, data & 0xff);
     address = (address + 1) & (MAX_IOPORTS - 1);
-    ioport_write_table[0][address](ioport_opaque[address], address, (data >> 
8) & 0xff);
+    func = ioport_write_table[0][address];
+    if (!func)
+           func = default_ioport_writeb;
+    func(ioport_opaque[address], address, (data >> 8) & 0xff);
 }
 
 uint32_t default_ioport_readl(void *opaque, uint32_t address)
@@ -230,16 +242,6 @@ void default_ioport_writel(void *opaque,
 
 void init_ioports(void)
 {
-    int i;
-
-    for(i = 0; i < MAX_IOPORTS; i++) {
-        ioport_read_table[0][i] = default_ioport_readb;
-        ioport_write_table[0][i] = default_ioport_writeb;
-        ioport_read_table[1][i] = default_ioport_readw;
-        ioport_write_table[1][i] = default_ioport_writew;
-        ioport_read_table[2][i] = default_ioport_readl;
-        ioport_write_table[2][i] = default_ioport_writel;
-    }
 }
 
 /* size is the word size in byte */
@@ -354,11 +356,14 @@ int strstart(const char *str, const char
 
 void cpu_outb(CPUState *env, int addr, int val)
 {
+    IOPortWriteFunc *func = ioport_write_table[0][addr];
+    if (!func)
+           func = default_ioport_writeb;
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "outb: %04x %02x\n", addr, val);
 #endif    
-    ioport_write_table[0][addr](ioport_opaque[addr], addr, val);
+    func(ioport_opaque[addr], addr, val);
 #ifdef USE_KQEMU
     if (env)
         env->last_io_time = cpu_get_time_fast();
@@ -367,11 +372,14 @@ void cpu_outb(CPUState *env, int addr, i
 
 void cpu_outw(CPUState *env, int addr, int val)
 {
+    IOPortWriteFunc *func = ioport_write_table[1][addr];
+    if (!func)
+           func = default_ioport_writew;
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "outw: %04x %04x\n", addr, val);
 #endif    
-    ioport_write_table[1][addr](ioport_opaque[addr], addr, val);
+    func(ioport_opaque[addr], addr, val);
 #ifdef USE_KQEMU
     if (env)
         env->last_io_time = cpu_get_time_fast();
@@ -380,11 +388,14 @@ void cpu_outw(CPUState *env, int addr, i
 
 void cpu_outl(CPUState *env, int addr, int val)
 {
+    IOPortWriteFunc *func = ioport_write_table[2][addr];
+    if (!func)
+           func = default_ioport_writel;
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "outl: %04x %08x\n", addr, val);
 #endif
-    ioport_write_table[2][addr](ioport_opaque[addr], addr, val);
+    func(ioport_opaque[addr], addr, val);
 #ifdef USE_KQEMU
     if (env)
         env->last_io_time = cpu_get_time_fast();
@@ -394,7 +405,10 @@ int cpu_inb(CPUState *env, int addr)
 int cpu_inb(CPUState *env, int addr)
 {
     int val;
-    val = ioport_read_table[0][addr](ioport_opaque[addr], addr);
+    IOPortReadFunc *func = ioport_read_table[0][addr];
+    if (!func)
+           func = default_ioport_readb;
+    val = func(ioport_opaque[addr], addr);
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "inb : %04x %02x\n", addr, val);
@@ -409,7 +423,10 @@ int cpu_inw(CPUState *env, int addr)
 int cpu_inw(CPUState *env, int addr)
 {
     int val;
-    val = ioport_read_table[1][addr](ioport_opaque[addr], addr);
+    IOPortReadFunc *func = ioport_read_table[1][addr];
+    if (!func)
+           func = default_ioport_readw;
+    val = func(ioport_opaque[addr], addr);
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "inw : %04x %04x\n", addr, val);
@@ -424,7 +441,10 @@ int cpu_inl(CPUState *env, int addr)
 int cpu_inl(CPUState *env, int addr)
 {
     int val;
-    val = ioport_read_table[2][addr](ioport_opaque[addr], addr);
+    IOPortReadFunc *func = ioport_read_table[2][addr];
+    if (!func)
+           func = default_ioport_readl;
+    val = func(ioport_opaque[addr], addr);
 #ifdef DEBUG_IOPORT
     if (loglevel & CPU_LOG_IOPORT)
         fprintf(logfile, "inl : %04x %08x\n", addr, val);

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