Initial physical page manager

+ Will probably still need a fair bit of tweakind and documentation
improvements, but seems to work outside of the kernel. Also no valgrind
errors, which is quite promising I guess.

4 files changed, 20 insertions, 4 deletions

diff --git a/arch/riscv/config.h b/arch/riscv/config.h
index 1818316..3eedb39 100644
--- a/arch/riscv/config.h
+++ b/arch/riscv/config.h
@@ -1,3 +1,10 @@
 #include <apos/sizes.h>
 #define PM_KERN 0x83800000
 #define VM_KERN ((-1) - SZ_1G)
+
+#define MAX_ORDER 3
+#define PAGE_SHIFT 12
+#define O0_WIDTH 9
+#define O1_WIDTH 9
+#define O2_WIDTH 9
+#define O3_WIDTH 0
diff --git a/arch/riscv/init/init.c b/arch/riscv/init/init.c
index 6bb6bc3..e12c351 100644
--- a/arch/riscv/init/init.c
+++ b/arch/riscv/init/init.c
@@ -3,6 +3,7 @@
 #include <apos/types.h>
 #include <apos/string.h>
 #include <apos/debug.h>
+#include <apos/pmem.h>
 #include <libfdt.h>
 #include <pages.h>
 #include <csr.h>
@@ -118,11 +119,19 @@ void init_debug(void *fdt)
 
 #endif
 
-void init(void *fdt)
+void __noreturn init(void *fdt)
 {
 	init_debug(fdt);
-	dbg("hello\n");
 
+	/* basic memory layout info */
 	struct mem_layout pmem = get_memlayout(fdt);
-	/* struct mm_ptinfo ptbl = create_pagetable(pmem); */
+
+	/* TODO: find first contiguous region */
+
+	/* generate pagetable at contiguous region */
+	populate_pmap(pmem.base, pmem.top - pmem.base, 0/* something */);
+
+	/* TODO: mark all used pages */
+	update_pmap(0/* TODO: figure out where in virtual memory the page map should be mapped */);
+	/* TODO: jump to kernel */
 }
diff --git a/arch/riscv/main.c b/arch/riscv/kernel/main.c
index 9334fb3..9334fb3 100644
--- a/arch/riscv/main.c
+++ b/arch/riscv/kernel/main.c
diff --git a/arch/riscv/source.mk b/arch/riscv/source.mk
index 50e0f5f..2d79625 100644
--- a/arch/riscv/source.mk
+++ b/arch/riscv/source.mk
@@ -1,4 +1,4 @@
-KERNEL_LOCAL	!= echo arch/riscv/*.[cS]
+KERNEL_LOCAL	!= echo arch/riscv/kernel/*.[cS]
 KERNEL_SOURCES	+= $(KERNEL_LOCAL)
 
 INIT_LOCAL	!= echo arch/riscv/init/*.[cS]