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#define FOOLOS_MODULE_NAME "mp"
#include "x86.h"
#include "../lib/logger/log.h" // logger facilities
typedef struct mp_fps_struct
{
uint32_t sig; //signature "_MP_"
uint32_t conf; //pointer to config struct
uint8_t length; //should be 1
uint8_t version; // 1=1.1, 4=1.4
uint8_t checksum;
uint8_t features1;
uint8_t features2;
uint8_t res1; //reserved
uint8_t res2;
uint8_t res3;
}mp_fps;
typedef struct mp_config_struct
{
uint32_t sig; //signature "PCMP"
uint16_t length; //base table length
uint8_t version; //revision 1=1.1 4=1.4
uint8_t checksum;
uint32_t oemid1; //OEM id (ascii)
uint32_t oemid2;
uint32_t prodid1; //Product id (ascii)
uint32_t prodid2;
uint32_t prodid3;
uint32_t oem_table; //pointer (optional)
uint16_t oem_size; //size of this table
uint16_t entries; //entry count (following the header)
uint32_t local_apic; //local apic address (same for every cpu)
uint16_t length_ext; //extended table length (optional)
uint8_t check_ext; //checksum for ext. table
}mp_config;
//entries are sorted, but we do not care.
uint8_t *walk_mp_table(uint8_t *start_addr)
{
if(*start_addr==0x0||*start_addr==0x2)
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"entry type: %d",*start_addr);
if(*start_addr==0x00)return start_addr+20;
return start_addr+8;
}
void show_mp_conf(mp_config *addr)
{
char buf[]="XXXX";
uint32_t *buf_addr=buf;
*buf_addr=addr->sig;
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config tabel addr: %08X",addr);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config signature: %s",buf);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config version: %02X",addr->version);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config # of entries: %d",addr->entries);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config local apic addr: 0x%08X",addr->local_apic);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mp_config tabel length: %d",addr->length);
uint8_t *start_addr=addr;
start_addr+=44;
for(int i=0;i<addr->entries;i++)
{
// log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"go 0x%08X",start_addr);
start_addr=walk_mp_table(start_addr);
}
}
void show_mp_fps(mp_fps *addr)
{
if(addr->length!=1)return;
if(addr->version!=1&&addr->version!=4)return;
char buf[]="XXXX";
uint32_t *buf_addr=buf;
*buf_addr=addr->sig;
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"signature: %s",buf);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"conf: %08X",addr->conf);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"ver: %02X",addr->version);
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"f1: %02X",addr->features1);
if(addr->features1!=0)panic(FOOLOS_MODULE_NAME,"Intel default config not supported yet!");
show_mp_conf(addr->conf);
}
bool check_mp(uint8_t *addr)
{
char test[]="_MP_";
for(int i=0;i<4;i++)
{
if(test[i]!=*(addr+i))return false;
}
return true;
}
// todo: check checksum,version etc. and narrow down search
bool find_mp()
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Looking for Mp Floating Ponter Struct...");
uint8_t *addr=0x80000;
while(addr<=0xfffff)
{
if(check_mp(addr))
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Found at 0x%04X",addr);
show_mp_fps(addr);
}
addr++;
}
return true;
}
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