Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

We shouldn't trust the TOS, but for now use the cookie jar to find the cpu type and if it has lpstop.

Browse Source 
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23461 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2008-01-12 23:56:47 +00:00
parent 416458e9c4
commit 89f97fe903
1 changed files with 16 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/system/boot/platform/atari_m68k/cpu.cpp
View File

@ -8,6 +8,7 @@
#include "cpu.h" #include "cpu.h"
#include "toscalls.h"
#include <OS.h> #include <OS.h>
#include <boot/platform.h> #include <boot/platform.h>
@ -28,16 +29,23 @@
# define TRACE(x) ; # define TRACE(x) ;
#endif #endif
bool gCpuHasLPSTOP = false;
static status_t static status_t
check_cpu_features() check_cpu_features()
{ {
#warning M68K: check for LPSTOP #warning M68K: TODO: probe ourselves, we shouldn't trust the TOS!
if (false)
gCpuHasLPSTOP = true;
#warning M68K: check for >= 020 const tos_cookie *c = tos_find_cookie('_CPU');
if (!c) {
panic("can't get a cookie (_CPU)! Mum, I'm hungry!");
return EINVAL;
}
#warning M68K: check for 020 + mmu
if (c->ivalue < 30/*20*/)
return EINVAL;
gKernelArgs.arch_args.has_lpstop = (c->ivalue >= 60)?true:false;
#warning M68K: add cpu type to kern args
return B_OK; return B_OK;
} }
@ -50,13 +58,8 @@ extern "C" void
spin(bigtime_t microseconds) spin(bigtime_t microseconds)
{ {
bigtime_t time = system_time(); bigtime_t time = system_time();
if (gCpuHasLPSTOP) { while ((system_time() - time) < microseconds)
while ((system_time() - time) < microseconds) asm volatile ("nop;");
asm volatile ("nop;");//asm volatile ("lpstop;");
} else {
while ((system_time() - time) < microseconds)
asm volatile ("nop;");
}
} }