1 files changed, 0 insertions, 148 deletions
diff --git a/arch/riscv64/init/init.c b/arch/riscv64/init/init.c
deleted file mode 100644
index a4fa696..0000000
--- a/arch/riscv64/init/init.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/* SPDX-License-Identifier: copyleft-next-0.3.1 */
-/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
-
-/**
- * @file init.c
- * riscv64 'bootstrap', move actual kernel into place and jump to virtual
- * memory.
- */
-
-#include <kmi/types.h>
-#include <kmi/attrs.h>
-#include <kmi/utils.h>
-#include <kmi/vmem.h>
-#include <arch/vmem.h>
-#include <libfdt.h>
-
-#include "../kernel/csr.h"
-
-void flush_tlb_full()
-{
-	/** @todo could be nice to have a common set of features with kernel,
-	 * but for now this is good enough. */
-	__asm__ volatile ("sfence.vma\n" ::: "memory");
-}
-
-/**
- * Create page table entry.
- * Copy from \ref arch/riscv64/kernel/vmem.c.
- *
- * @param a Virtual address.
- * @param f PTE flags.
- */
-#define to_pte(a, f) (((a) >> 12) << 10 | (f))
-
-/**
- * Get RAM base address from fdt.
- * @todo in case of multiple RAM banks, should try to just find one
- * of them and let the kernel figure the rest out. Kernel doesn't currently
- * support multiple RAM banks.
- *
- * @param fdt FDT pointer.
- * @return Physical address of ram base.
- */
-static pm_t __fdt_ram_base(void *fdt)
-{
-	int mem_offset = fdt_path_offset(fdt, "/memory");
-	const void *mem_reg = fdt_getprop(fdt, mem_offset, "reg", NULL);
-
-	struct cell_info ci = get_cellinfo(fdt, mem_offset);
-	return (pm_t)fdt_load_int_ptr(ci.addr_cells, mem_reg);
-}
-
-/**
- * Jump into virtual memory.
- *
- * @param load_addr Address where init has been loaded.
- * @param ram_base RAM base.
- */
-static void init_bootmem(uintptr_t load_addr, uintptr_t ram_base)
-{
-	/* set all flags on, especially A and D since MMUs are allowed to raise
-	 * exceptions that we're not ready to handle if they're unset. */
-	size_t flags = VM_V | VM_X | VM_R | VM_W | VM_D | VM_A;
-
-	extern char *__kernel;
-	extern char *__kernel_size;
-	uintptr_t top = load_addr + (uintptr_t)&__kernel +
-	                (uintptr_t)&__kernel_size;
-
-	/* this could be risky, as we might overwrite some bits of initrd or fdt
-	 * if they're allocated too close to the kernel payload.
-	 * @todo Allocate root_branch statically? */
-	struct vmem *root_branch = (struct vmem *)align_up(top, SZ_4K);
-
-	/* direct mapping (temp) */
-	for (size_t i = 0; i <= CSTACK_PAGE; ++i)
-		root_branch->leaf[i] = (struct vmem *)to_pte(TOP_PAGE_SIZE * i,
-		                                             flags);
-
-	/* kernel (also sort of direct mapping) */
-	flags |= VM_G;
-	for (size_t i = KSTART_PAGE; i < IO_PAGE; ++i)
-		root_branch->leaf[i] = (struct vmem *)to_pte(
-			ram_base + TOP_PAGE_SIZE * (i - KSTART_PAGE), flags);
-
-	/* kernel IO, map to 0 for now, will be updated in the future */
-	root_branch->leaf[IO_PAGE] = (struct vmem *)to_pte(0, flags);
-
-	uintmax_t mode = Sv39;
-	switch (DEFAULT_Sv_MODE) {
-	case Sv32: mode = SATP_MODE_Sv32; break;
-	case Sv39: mode = SATP_MODE_Sv39; break;
-	case Sv48: mode = SATP_MODE_Sv48; break;
-	default: break;
-	};
-
-	flush_tlb_full();
-	csr_write(CSR_SATP, mode | ((uintptr_t)root_branch >> 12));
-}
-
-/**
- * Relocate kernel proper.
- * @param load_addr Address to where init has been loaded.
- * Used in calculating kernel start address.
- */
-static void move_kernel(uintptr_t load_addr)
-{
-	extern char *__kernel;
-	extern char *__kernel_size;
-
-	size_t sz = (size_t)&__kernel_size;
-	char *src = load_addr + (char *)&__kernel;
-	char *dst = (char *)VM_KERN;
-	for (size_t i = 0; i < sz; ++i)
-		dst[i] = src[i];
-}
-
-/**
- * Main driver for the init loader.
- *
- * @param fdt Global FDT pointer, provided by bootloader.
- * @param load_addr Address to where init has been loaded.
- */
-void init(void *fdt, pm_t load_addr)
-{
-	extern void jump_to_kernel(void *fdt, pm_t ram_base, void *k);
-
-	pm_t ram_base = __fdt_ram_base(fdt);
-
-	init_bootmem(load_addr, ram_base);
-	move_kernel(load_addr);
-
-	jump_to_kernel(fdt, ram_base, (void *)VM_KERN);
-}
-
-#if GENERIC_UBOOT
-void init_go(int argc, char **argv, pm_t load_addr)
-{
-	if (argc != 2)
-		return;
-
-	void *fdt = (void *)strtouintptr(argv[1]);
-
-	/* fdt is passed as second argument, load address first but since we
-	 * already have it due to our ingenious _start, no need to parse it */
-	init(fdt, load_addr);
-}
-#endif