Allow building with clang

+ Release mode is sort of broken, as lto doesn't work with linker
  relaxation and turning the relaxation off causes issues with the jump
  from init to kernel (as I've currently implemented it, could probably
  be fixed with a manual jump from assembly, I'll add it to my TODO
  list)

6 files changed, 0 insertions, 259 deletions

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
deleted file mode 100644
index 6ae4ee7..0000000
--- a/arch/riscv/kernel/cpu.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <apos/cpu.h>
-
-id_t cpu_id()
-{
-	return 0; /* VERY MUCH TEMP */
-}
diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c
deleted file mode 100644
index f844dd1..0000000
--- a/arch/riscv/kernel/irq.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <apos/irq.h>
-#include <apos/attrs.h>
-#include <apos/debug.h>
-#include <csr.h>
-
-void init_irq(void *fdt)
-{
-	UNUSED(fdt);
-	csr_write(CSR_STVEC, &handle_irq);
-	
-	long s = 0;
-	csr_read(CSR_SIE, s);
-	info("CSR_SIE: %lx\n", s);
-}
-
-__aligned(4) void handle_irq()
-{
-	while(1);
-}
-
-/* very simple for now */
-void enable_irq()
-{
-	csr_set(CSR_SSTATUS, CSR_SIE);
-}
-
-void disable_irq()
-{
-	csr_clear(CSR_SSTATUS, CSR_SIE);
-}
diff --git a/arch/riscv/kernel/main.c b/arch/riscv/kernel/main.c
deleted file mode 100644
index 9ce256e..0000000
--- a/arch/riscv/kernel/main.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <apos/utils.h>
-#include <csr.h>
-
-void arch_setup(void *fdt)
-{
-	UNUSED(fdt);
-	/* allow supervisor code to touch user pages */
-	csr_set(CSR_SSTATUS, SSTATUS_SUM);
-	/* mark that we want to eventually jump to userspace */
-	csr_clear(CSR_SSTATUS, SSTATUS_SPP);
-}
diff --git a/arch/riscv/kernel/pmem.c b/arch/riscv/kernel/pmem.c
deleted file mode 100644
index 45b8eeb..0000000
--- a/arch/riscv/kernel/pmem.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <apos/pmem.h>
-
-int arch_pmem_conf(void *fdt, size_t *max_order, size_t *base_bits, size_t bits[ORDERS_NUM])
-{
-	UNUSED(fdt);
-
-	/* Sv39 for now */
-	*max_order = 2;
-	*base_bits = 12;
-	/* we can assume bits[] is zeroed out beforehand */
-	for(size_t i = 0; i <= *max_order; ++i)
-		bits[i] = 9;
-
-	return 0;
-}
diff --git a/arch/riscv/kernel/proc.c b/arch/riscv/kernel/proc.c
deleted file mode 100644
index 6120c2d..0000000
--- a/arch/riscv/kernel/proc.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <apos/tcb.h>
-#include <apos/elf.h>
-#include <csr.h>
-
-void jump_to_userspace(struct tcb *t, int argc, char **argv)
-{
-	csr_write(CSR_SEPC, t->entry);
-	__asm__("mv sp, %0\n" : "=r" (t->proc_stack) :: "memory");
-	__asm__("sret\n" ::: "memory");
-}
-
-void return_to_userspace(struct tcb *t)
-{
-	/* lol */
-}
diff --git a/arch/riscv/kernel/vmem.c b/arch/riscv/kernel/vmem.c
deleted file mode 100644
index 1f1f44a..0000000
--- a/arch/riscv/kernel/vmem.c
+++ /dev/null
@@ -1,182 +0,0 @@
-#include <apos/string.h>
-#include <apos/pmem.h>
-#include <apos/vmem.h>
-#include <apos/mem.h>
-#include <apos/debug.h>
-#include <apos/cpu.h>
-#include <pages.h>
-#include <vmem.h>
-#include <csr.h>
-
-#define pte_ppn(pte) (((pm_t)(pte)) >> 10)
-#define pte_flags(pte) (((pm_t)(pte)) & 0xff)
-#define to_pte(p, f) ((pm_to_pnum(p) << 10) | (f))
-#define pte_addr(pte) __va(pnum_to_paddr(pte_ppn(pte)))
-#define pte_paddr(pte) (pnum_to_paddr(pte_ppn(pte)))
-#define vm_to_index(a, o) (pm_to_index(a, o))
-#define is_active(pte) (pte_flags(pte) & VM_V)
-#define is_leaf(pte) (is_active(pte) && (pte_flags(pte) & ~VM_V))
-#define is_branch(pte) (is_active(pte) && !(pte_flags(pte) & ~VM_V))
-
-static pm_t *__find_vmem(struct vm_branch *b, vm_t v, enum mm_order *o)
-{
-	enum mm_order top = __mm_max_order;
-	if(o)
-		*o = MM_O0;
-	do {
-		size_t idx = vm_to_index(v, top);
-		pm_t pte = (pm_t)b->leaf[idx];
-
-		if(!pte)
-			return 0;
-
-		if(is_leaf(pte)){
-			if(o)
-				*o = top;
-
-			return (pm_t *)&b->leaf[idx];
-		}
-
-		b = (struct vm_branch *)pte_addr(pte);
-	} while (top--);
-
-	return 0;
-}
-
-int mod_vmem(struct vm_branch *branch, vm_t vaddr, pm_t paddr, uint8_t flags)
-{
-	pm_t *pte = __find_vmem(branch, vaddr, 0);
-	if(pte){
-		*pte = to_pte((pm_t)__pa(paddr), flags);
-		return 0;
-	}
-
-	return -1;
-}
-
-/* huh, should probably add status flags etc. to all my API functions. Damn, I'm
- * lazy. */
-int stat_vmem(struct vm_branch *branch, vm_t vaddr, pm_t *paddr,
-		enum mm_order *order, uint8_t *flags)
-{
-	pm_t *pte = __find_vmem(branch, vaddr, order);
-	if(pte){
-		if(paddr)
-			*paddr = (pm_t)pte_addr(*pte);
-
-		if(flags)
-			*flags = pte_flags(*pte);
-
-		return 0;
-	}
-
-	return -1;
-}
-
-static struct vm_branch *__create_leaf()
-{
-	pm_t new_leaf = alloc_page(MM_KPAGE, 0);
-	memset((void *)new_leaf, 0, sizeof(struct vm_branch));
-	return (struct vm_branch *)to_pte((pm_t)__pa(new_leaf), VM_V);
-}
-
-static void __destroy_branch(struct vm_branch *b)
-{
-	if(!b)
-		return;
-
-	for(size_t i = 0; i < BASE_PAGE_SIZE / sizeof(pm_t); ++i){
-		if(is_branch(b->leaf[i]))
-			__destroy_branch((struct vm_branch *)pte_addr(b->leaf[i]));
-
-		free_page(MM_KPAGE, (pm_t)pte_addr(b->leaf[i]));
-	}
-}
-
-void map_vmem(struct vm_branch *branch,
-		pm_t paddr, vm_t vaddr, uint8_t flags, enum mm_order order)
-{
-	enum mm_order top = __mm_max_order;
-	while (top != order) {
-		size_t idx = vm_to_index(vaddr, top);
-
-		if (!branch->leaf[idx])
-			branch->leaf[idx] = __create_leaf();
-
-
-		branch = (struct vm_branch *)pte_addr(branch->leaf[idx]);
-		top--;
-	}
-
-	size_t idx = vm_to_index(vaddr, top);
-	if (is_branch(branch->leaf[idx])) /* something has gone terribly wrong */
-		__destroy_branch(branch->leaf[idx]);
-
-	branch->leaf[idx] = (struct vm_branch *)to_pte((pm_t)__pa(paddr), flags);
-}
-
-void unmap_vmem(struct vm_branch *branch, vm_t vaddr)
-{
-
-	pm_t *pte = __find_vmem(branch, vaddr, 0);
-	if(pte)
-		*pte = 0;
-}
-
-void flush_tlb()
-{
-	__asm__("sfence.vma %0\n" :: "rk" (cpu_id()) : "memory");
-}
-
-void flush_tlb_all()
-{
-	__asm__("sfence.vma\n" ::: "memory");
-}
-
-static void start_vmem(struct vm_branch *branch, enum mm_mode m)
-{
-	branch = (struct vm_branch *)__pa(branch);
-
-	if(m == Sv32)
-		csr_write(CSR_SATP, SATP_MODE_Sv32 | pm_to_pnum((pm_t)(branch)));
-	else if (m == Sv39)
-		csr_write(CSR_SATP, SATP_MODE_Sv39 | pm_to_pnum((pm_t)(branch)));
-	else
-		csr_write(CSR_SATP, SATP_MODE_Sv48 | pm_to_pnum((pm_t)(branch)));
-
-	flush_tlb_all();
-	/* Sv57 && Sv64 in the future? */
-}
-
-struct vm_branch *init_vmem(void *fdt)
-{
-	UNUSED(fdt);
-	struct vm_branch *b = (struct vm_branch *)alloc_page(MM_KPAGE, 0);
-	memset(b, 0, MM_KPAGE_SIZE);
-
-	populate_root_branch(b);
-	/* update which memory branch to use */
-	start_vmem(b, Sv39);
-	return b;
-}
-
-void populate_root_branch(struct vm_branch *b)
-{
-	size_t flags = VM_V | VM_R | VM_W | VM_X | VM_G;
-	for(size_t i = KSTART_PAGE; i < IO_PAGE; ++i)
-		b->leaf[i] = (struct vm_branch *)to_pte(RAM_BASE + SZ_1G * (i - KSTART_PAGE), flags);
-
-	/* map kernel IO to zero for now, this will be overridden later
-	 * (if at all) */
-	b->leaf[IO_PAGE] = (struct vm_branch *)to_pte(0, flags);
-}
-
-#ifdef DEBUG
-int setup_kernel_io(struct vm_branch *b, vm_t paddr)
-{
-	/* assume Sv39 for now */
-	pm_t gigapage = paddr / MM_GPAGE_SIZE;
-	b->leaf[IO_PAGE] = (struct vm_branch *)to_pte(gigapage, VM_V | VM_R | VM_W);
-	return -SZ_1G + paddr - (gigapage * MM_GPAGE_SIZE);
-}
-#endif