misc fixes

+ Align kernel to 2MiB boundary in u-boot

+ Optimize alignment functions a little bit, should still have to check
  on real hardware but 'feels' more clean

+ Add early boot debugging

+ Put extra cores we aren't ready to account for to sleep if/when they
  boot.

+ Make BASE_PAGE_SIZE constant on riscv64/32, helps the compiler with
  some alignment checks among other things.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index b51c519..f3c5e17 100644
--- a/src/main.c
+++ b/src/main.c
@@ -61,8 +61,6 @@ __noreturn void kernel(void *fdt, uintptr_t load_addr, struct vmem *d)
 	/* we should be in kernelspace, so use the virtual address of our FDT. */
 	fdt = __va(fdt);
 
-	/* dbg uses direct mapping at this point */
-	init_dbg(fdt);
 	/* start up debugging in kernel IO */
 	setup_io_dbg(d);
 
@@ -105,6 +103,10 @@ __noreturn void main(unsigned long hart, void *fdt, uintptr_t load_addr)
 	 * have to get the function signature right */
 	(void)hart;
 
+	/* dbg uses direct mapping at this point, useful for early init asserts
+	 * and so on */
+	init_dbg(fdt);
+
 	/** @todo some kind of lottery? */
 	pm_t ram_base = __fdt_ram_base(fdt);
 	pm_t ram_size = __fdt_ram_size(fdt);
@@ -114,6 +116,11 @@ __noreturn void main(unsigned long hart, void *fdt, uintptr_t load_addr)
 
 	init_mem(fdt);
 
+	/* we don't have any debug output just yet but still */
+	/* also this is I guess more of an architecture limitation, should the
+	 * whole of main() just be moved to arch? */
+	assert(is_aligned(load_addr, order_size(MM_O1)));
+
 	struct vmem *d = init_mapping();
 	to_kernelspace(fdt, load_addr, d, ram_base);
 	unreachable();