From 8d3e390bdac5f7d7380d75db2eab685d27186138 Mon Sep 17 00:00:00 2001
From: Jorrit Herder <jnherder@minix3.org>
Date: Thu, 21 Jul 2005 18:32:49 +0000
Subject: [PATCH] Added new BASE_MEM_TOP to restrict sys_vircopy() calls from
 BIOS. Updated comments at PRINTF_PROC --- it works again.

---
 include/ibm/memory.h   | 2 ++
 include/minix/com.h    | 4 ++--
 include/minix/config.h | 7 +++++--
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/ibm/memory.h b/include/ibm/memory.h
index 740bdbc4f..303f3864c 100644
--- a/include/ibm/memory.h
+++ b/include/ibm/memory.h
@@ -18,6 +18,7 @@
 /* Physical memory layout. Design decisions made for the earliest PCs, caused
  * memory to be broken broken into the following four basic pieces:
  *  - Conventional or base memory: first 640 KB (incl. BIOS data, see below);
+ *    The top of conventional memory is often used by the BIOS to store data.
  *  - Upper Memory Area (UMA): upper 384 KB of the first megabyte of memory;
  *  - High Memory Area (HMA): ~ first 64 KB of the second megabyte of memory;
  *  - Extended Memory: all the memory above first megabyte of memory.
@@ -26,6 +27,7 @@
  * when the processor is in real mode. 
  */
 #define BASE_MEM_BEGIN            0x000000
+#define BASE_MEM_TOP		  0x090000	
 #define BASE_MEM_END              0x09FFFF
 
 #define UPPER_MEM_BEGIN           0x0A0000
diff --git a/include/minix/com.h b/include/minix/com.h
index 33d09e71f..dae605417 100755
--- a/include/minix/com.h
+++ b/include/minix/com.h
@@ -224,7 +224,7 @@
 #  define SYS_SETALARM	16	/* sys_setalarm(proc_nr,exp_time,abs_time) */
 
 #  define SYS_PHYSVCOPY 18	/* sys_physvcopy(vec_ptr, vec_size) */
-#  define SYS_SVRCTL    19	/* sys_svrctl(proc_nr, req, argp) */
+#  define SYS_PRIVCTL   19	/* sys_privctl(proc_nr, ...) */
 #  define SYS_SDEVIO    20	/* sys_sdevio(port, proc_nr, buf, count) */
 #  define SYS_SIGRETURN 21	/* sys_sigreturn(proc_nr, ctxt_ptr, flags) */
 #  define SYS_GETINFO   22 	/* sys_getinfo(what, whereto) */
@@ -244,7 +244,7 @@
 /* Field names for SYS_MEMSET, SYS_SEGCTL. */
 #define MEM_PTR		m1_p1	/* base */
 #define MEM_COUNT	m1_i1	/* count */
-#define MEM_CHAR	m1_i2   /* char to write */
+#define MEM_PATTERN	m1_i2   /* pattern to write */
 #define MEM_CHUNK_BASE	m4_l1	/* physical base address */
 #define MEM_CHUNK_SIZE	m4_l2	/* size of mem chunk */
 #define MEM_TOT_SIZE	m4_l3	/* total memory size */
diff --git a/include/minix/config.h b/include/minix/config.h
index deae4289b..6a0db76fe 100755
--- a/include/minix/config.h
+++ b/include/minix/config.h
@@ -102,8 +102,11 @@
 #define ENABLE_BINCOMPAT   0	/* for binaries using obsolete calls */
 #define ENABLE_SRCCOMPAT   0	/* for sources using obsolete calls */
 
-/* Which process should receive diagnostics from the kernel and system? */
-#define PRINTF_PROC		TTY
+/* Which process should receive diagnostics from the kernel and system? 
+ * Directly sending it to TTY only displays the output. Sending it to the
+ * log driver will cause the diagnostics to be buffered and displayed.
+ */
+#define PRINTF_PROC		LOG_PROC_NR	/* TTY or LOG_PROC_NR */
 
 /* NR_CONS, NR_RS_LINES, and NR_PTYS determine the number of terminals the
  * system can handle.