From 7f71ee15dfca8cd3e6ba4309ed768015ffbe8644 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 17 Sep 2025 01:44:55 -0400
Subject: kern: Make memmap dump configurable via kconf

Use the OSMORA kernel configuration framework to add options for L5Lunos
to parse during early startup.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/Makefile            |  4 ++--
 src/sys/arch/amd64/Makefile |  2 +-
 src/sys/conf/GENERIC        |  1 +
 src/sys/os/Makefile         |  2 +-
 src/sys/vm/vm_seg.c         | 13 ++++++++++++-
 5 files changed, 17 insertions(+), 5 deletions(-)
 create mode 100644 src/sys/conf/GENERIC

(limited to 'src/sys')

diff --git a/src/sys/Makefile b/src/sys/Makefile
index 561da50..78c3762 100644
--- a/src/sys/Makefile
+++ b/src/sys/Makefile
@@ -10,11 +10,11 @@ all: os lib md
 
 .PHONY: os
 os:
-	cd os; make CC=$(CC) LD=$(LD) AS=$(AS) TARGETDIR=$(TARGETDIR)
+	cd os; make CC=$(CC) LD=$(LD) AS=$(AS) TARGETDIR=$(TARGETDIR) CONF=$(CONF)
 
 .PHONY: md
 md:
-	cd $(TARGETDIR); make CC=$(CC) LD=$(LD) AS=$(AS)
+	cd $(TARGETDIR); make CC=$(CC) LD=$(LD) AS=$(AS) CONF=$(CONF)
 
 .PHONY: clean
 clean:
diff --git a/src/sys/arch/amd64/Makefile b/src/sys/arch/amd64/Makefile
index f4f4f48..1eae962 100644
--- a/src/sys/arch/amd64/Makefile
+++ b/src/sys/arch/amd64/Makefile
@@ -4,7 +4,7 @@ override PROMPT := printf "%s\t\t%s\n"
 
 TARGET_BIN = ../../l5
 TARGET_INC = -I../../target/header/
-CFLAGS = -I../../include/ -I../../include/lib/ $(TARGET_INC) $(MI_CFLAGS) $(MD_CFLAGS)
+CFLAGS = -I../../include/ -I../../include/lib/ $(TARGET_INC) $(MI_CFLAGS) $(MD_CFLAGS) $(CONF)
 CFILES = $(shell find . -name "*.c")
 
 ASMFILES = $(shell find . -name "*.S")
diff --git a/src/sys/conf/GENERIC b/src/sys/conf/GENERIC
new file mode 100644
index 0000000..816ece3
--- /dev/null
+++ b/src/sys/conf/GENERIC
@@ -0,0 +1 @@
+option DUMP_MEMMAP  yes     // Dump memory map on boot
diff --git a/src/sys/os/Makefile b/src/sys/os/Makefile
index 158eab4..693c008 100644
--- a/src/sys/os/Makefile
+++ b/src/sys/os/Makefile
@@ -4,7 +4,7 @@ include ../conf/sys.mk
 override PROMPT := printf "%s\t\t%s\n"
 
 TARGET_LIB = ../target/libkern.a
-CFLAGS = -I../include/ -I../include/lib/ -I../target/header/ $(MI_CFLAGS) -O0
+CFLAGS = -I../include/ -I../include/lib/ -I../target/header/ $(MI_CFLAGS) -O0 $(CONF)
 CFILES = $(shell find . -name "*.c")
 CFILES += $(shell find ../vm -name "*.c")
 CFILES += $(shell find ../lib -name "*.c")
diff --git a/src/sys/vm/vm_seg.c b/src/sys/vm/vm_seg.c
index d4db468..682a61c 100644
--- a/src/sys/vm/vm_seg.c
+++ b/src/sys/vm/vm_seg.c
@@ -37,6 +37,13 @@
 #include <limine.h>
 #include <string.h>
 
+/* From kconf */
+#if defined(__DUMP_MEMMAP)
+#define DUMP_MEMMAP __DUMP_MEMMAP
+#else
+#define DUMP_MEMMAP 0
+#endif
+
 #define BYTES_PER_MIB 8388608
 
 static size_t pages_free = 0;
@@ -147,7 +154,11 @@ physmem_init_bitmap(void)
 
         start = ent->base;
         end = ent->base + ent->length;
-        printf("sysmem: [%p -> %p]: %s\n", start, end, typestr);
+
+        /* Should we dump the memory map? */
+        if (DUMP_MEMMAP) {
+            printf("sysmem: [%p -> %p]: %s\n", start, end, typestr);
+        }
 
         if (ent->type != LIMINE_MEMMAP_USABLE) {
             continue;
-- 
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