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-rw-r--r--src/arch/riscv/Makefile.inc1
-rw-r--r--src/arch/riscv/include/arch/sbi.h25
-rw-r--r--src/arch/riscv/include/mcall.h28
-rw-r--r--src/arch/riscv/mcall.c61
-rw-r--r--src/arch/riscv/sbi.S119
-rw-r--r--src/arch/riscv/trap_handler.c54
-rw-r--r--src/arch/riscv/virtual_memory.c35
7 files changed, 7 insertions, 316 deletions
diff --git a/src/arch/riscv/Makefile.inc b/src/arch/riscv/Makefile.inc
index c68fd1e066..057088acd4 100644
--- a/src/arch/riscv/Makefile.inc
+++ b/src/arch/riscv/Makefile.inc
@@ -97,7 +97,6 @@ ramstage-y += stages.c
ramstage-y += misc.c
ramstage-y += boot.c
ramstage-y += tables.c
-ramstage-y += sbi.S
ramstage-y += payload.S
ramstage-y += \
$(top)/src/lib/memchr.c \
diff --git a/src/arch/riscv/include/arch/sbi.h b/src/arch/riscv/include/arch/sbi.h
deleted file mode 100644
index 4f0552193c..0000000000
--- a/src/arch/riscv/include/arch/sbi.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2016 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-
-#ifndef _ARCH_SBI_H
-#define _ARCH_SBI_H
-
-#ifndef __ASSEMBLY__
-struct opaque;
-extern struct opaque sbi_page;
-#endif
-
-#endif
diff --git a/src/arch/riscv/include/mcall.h b/src/arch/riscv/include/mcall.h
index fe9611ca4c..e4bc36f080 100644
--- a/src/arch/riscv/include/mcall.h
+++ b/src/arch/riscv/include/mcall.h
@@ -23,20 +23,6 @@
/* We save 37 registers, currently. */
#define MENTRY_FRAME_SIZE (HLS_SIZE + 37 * 8)
-#define MCALL_HART_ID 0
-#define MCALL_NUM_HARTS 1
-#define MCALL_QUERY_MEMORY 2
-#define MCALL_CONSOLE_PUTCHAR 3
-#define MCALL_CONSOLE_GETCHAR 4
-#define MCALL_SEND_IPI 6
-#define MCALL_CLEAR_IPI 7
-#define MCALL_SHUTDOWN 8
-#define MCALL_SET_TIMER 9
-#define MCALL_REMOTE_SFENCE_VM 10
-#define MCALL_REMOTE_FENCE_I 11
-#define MCALL_CONFIG_STRING_BASE 12
-#define MCALL_CONFIG_STRING_SIZE 13
-
#ifndef __ASSEMBLER__
#include <arch/encoding.h>
@@ -44,12 +30,6 @@
#include <stdint.h>
typedef struct {
- unsigned long base;
- unsigned long size;
- unsigned long node_id;
-} memory_block_info;
-
-typedef struct {
unsigned long dev;
unsigned long cmd;
unsigned long data;
@@ -80,14 +60,6 @@ typedef struct {
#define MACHINE_STACK_SIZE RISCV_PGSIZE
-uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *p);
-uintptr_t mcall_console_putchar(uint8_t ch);
-uintptr_t mcall_dev_req(sbi_device_message *m);
-uintptr_t mcall_dev_resp(void);
-uintptr_t mcall_set_timer(unsigned long long when);
-uintptr_t mcall_clear_ipi(void);
-uintptr_t mcall_send_ipi(uintptr_t recipient);
-uintptr_t mcall_shutdown(void);
void hls_init(uint32_t hart_id); // need to call this before launching linux
#endif // __ASSEMBLER__
diff --git a/src/arch/riscv/mcall.c b/src/arch/riscv/mcall.c
index 111cb64b44..030accfe1d 100644
--- a/src/arch/riscv/mcall.c
+++ b/src/arch/riscv/mcall.c
@@ -28,7 +28,6 @@
#include <arch/barrier.h>
#include <arch/errno.h>
#include <atomic.h>
-#include <commonlib/configstring.h>
#include <console/console.h>
#include <mcall.h>
#include <string.h>
@@ -36,60 +35,6 @@
int mcalldebug; // set this interactively for copious debug.
-uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *info)
-{
- if (id == 0) {
- uintptr_t base;
- size_t size;
-
- query_mem(configstring(), &base, &size);
-
- mprv_write_ulong(&info->base, base);
- mprv_write_ulong(&info->size, size);
- return 0;
- }
-
- return -1;
-}
-
-uintptr_t mcall_send_ipi(uintptr_t recipient)
-{
- die("mcall_send_ipi is currently not implemented");
- return 0;
-}
-
-uintptr_t mcall_clear_ipi(void)
-{
- // only clear SSIP if no other events are pending
- if (HLS()->device_response_queue_head == NULL) {
- clear_csr(mip, MIP_SSIP);
- /* Ensure the other hart sees it. */
- mb();
- }
-
- return atomic_swap(&HLS()->ipi_pending, 0);
-}
-
-uintptr_t mcall_shutdown(void)
-{
- die("mcall_shutdown is currently not implemented");
- return 0;
-}
-
-uintptr_t mcall_set_timer(uint64_t when)
-{
- uint64_t *timecmp = HLS()->timecmp;
-
- if (mcalldebug)
- printk(BIOS_SPEW,
- "hart %d: HLS %p: mcall timecmp@%p to 0x%llx\n",
- HLS()->hart_id, HLS(), timecmp, when);
- *timecmp = when;
- clear_csr(mip, MIP_STIP);
- set_csr(mie, MIP_MTIP);
- return 0;
-}
-
void hls_init(uint32_t hart_id)
{
printk(BIOS_SPEW, "hart %d: HLS is %p\n", hart_id, HLS());
@@ -103,9 +48,3 @@ void hls_init(uint32_t hart_id)
printk(BIOS_SPEW, "Time is %p and timecmp is %p\n",
HLS()->time, HLS()->timecmp);
}
-
-uintptr_t mcall_console_putchar(uint8_t ch)
-{
- do_putchar(ch);
- return 0;
-}
diff --git a/src/arch/riscv/sbi.S b/src/arch/riscv/sbi.S
deleted file mode 100644
index 608afc3baa..0000000000
--- a/src/arch/riscv/sbi.S
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * RISC-V supervisor binary interface (SBI) trampoline page
- *
- * Copyright 2016 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; version 2 of
- * the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
- * GNU General Public License for more details.
- */
-
-#define __ASSEMBLY__
-#include <arch/encoding.h>
-#include <mcall.h>
-
-.section ".text.sbi", "ax", %progbits
-
-/* align to a page boundary */
-.align RISCV_PGSHIFT
-
-.globl sbi_page
-sbi_page:
-
- /*
- * None of the SBI entry points is located in the first half of the
- * page
- */
- .skip 0x800
-
- /* -2048: size_t sbi_hart_id(void); */
- li a7, MCALL_HART_ID
- ecall
- jr ra
- .align 4
-
- /* -2032: size_t sbi_num_harts(void); */
- li a7, MCALL_NUM_HARTS
- ecall
- jr ra
- .align 4
-
- /* -2016: unsigned long sbi_query_memory(unsigned long id,
- memory_block_info *p); */
- li a7, MCALL_QUERY_MEMORY
- ecall
- jr ra
- .align 4
-
- /* -2000: int sbi_console_putchar(uint8_t ch); */
- li a7, MCALL_CONSOLE_PUTCHAR
- ecall
- jr ra
- .align 4
-
- /* -1984: int sbi_console_getchar(void); */
- li a0, -1 /* failure: coreboot doesn't support console input */
- jr ra
- .align 4
-
- /* -1968: Not allocated */
- ebreak
- .align 4
-
- /* -1952: int sbi_send_ipi(size_t hart_id); */
- ebreak
- .align 4
-
- /* -1936: int bool sbi_clear_ipi(void); */
- ebreak
- .align 4
-
- /* -1920: unsigned long sbi_timebase(void); */
- li a0, 1000000000 /* I have no idea. */
- jr ra
- .align 4
-
- /* -1904: void sbi_shutdown(void); */
- li a7, MCALL_SHUTDOWN
- ecall
- jr ra
- .align 4
-
- /* -1888: void sbi_set_timer(unsigned long long stime_value); */
- li a7, MCALL_SET_TIMER
- ecall
- jr ra
- .align 4
-
- /* -1872: int sbi_mask_interrupt(int which); */
- li a0, 0 # dummy
- jr ra
- .align 4
-
- /* -1856: int sbi_unmask_interrupt(int which); */
- li a0, 0 # dummy
- jr ra
- .align 4
-
- /* -1840: void sbi_remote_sfence_vm(const uintptr_t* harts,
- size_t asid); */
- ebreak
- .align 4
-
- /* -1824: void sbi_remote_sfence_vm_range(const uintptr_t* harts,
- size_t asid, uintptr_t start, uintptr_t size); */
- ebreak
- .align 4
-
- /* -1808: void sbi_remote_fence_i(const uintptr_t* harts); */
- ebreak
- .align 4
-
-/* Fill the remainder of the page */
-.align RISCV_PGSHIFT
diff --git a/src/arch/riscv/trap_handler.c b/src/arch/riscv/trap_handler.c
index aea9b4d88b..b64505cc87 100644
--- a/src/arch/riscv/trap_handler.c
+++ b/src/arch/riscv/trap_handler.c
@@ -15,9 +15,7 @@
*/
#include <arch/exception.h>
-#include <arch/sbi.h>
#include <console/console.h>
-#include <mcall.h>
#include <string.h>
#include <vm.h>
#include <commonlib/configstring.h>
@@ -25,52 +23,6 @@
static uint64_t *time;
static uint64_t *timecmp;
-void handle_supervisor_call(trapframe *tf) {
- uintptr_t call = tf->gpr[17]; /* a7 */
- uintptr_t arg0 = tf->gpr[10]; /* a0 */
- uintptr_t arg1 = tf->gpr[11]; /* a1 */
- uintptr_t returnValue;
- switch(call) {
- case MCALL_HART_ID:
- printk(BIOS_DEBUG, "Getting hart id...\n");
- returnValue = read_csr(0xf14);//mhartid);
- break;
- case MCALL_NUM_HARTS:
- /* TODO: parse the hardware-supplied config string and
- return the correct value */
- returnValue = 1;
- break;
- case MCALL_CONSOLE_PUTCHAR:
- returnValue = mcall_console_putchar(arg0);
- break;
- case MCALL_SEND_IPI:
- printk(BIOS_DEBUG, "Sending IPI...\n");
- returnValue = mcall_send_ipi(arg0);
- break;
- case MCALL_CLEAR_IPI:
- printk(BIOS_DEBUG, "Clearing IPI...\n");
- returnValue = mcall_clear_ipi();
- break;
- case MCALL_SHUTDOWN:
- printk(BIOS_DEBUG, "Shutting down...\n");
- returnValue = mcall_shutdown();
- break;
- case MCALL_SET_TIMER:
- returnValue = mcall_set_timer(arg0);
- break;
- case MCALL_QUERY_MEMORY:
- printk(BIOS_DEBUG, "Querying memory, CPU #%lld...\n", arg0);
- returnValue = mcall_query_memory(arg0, (memory_block_info*) arg1);
- break;
- default:
- printk(BIOS_DEBUG, "ERROR! Unrecognized SBI call\n");
- returnValue = 0;
- break; // note: system call we do not know how to handle
- }
- tf->gpr[10] = returnValue;
- write_csr(mepc, read_csr(mepc) + 4);
-}
-
static const char *const exception_names[] = {
"Instruction address misaligned",
"Instruction access fault",
@@ -204,6 +156,7 @@ void trap_handler(trapframe *tf)
case CAUSE_FAULT_LOAD:
case CAUSE_FAULT_STORE:
case CAUSE_USER_ECALL:
+ case CAUSE_SUPERVISOR_ECALL:
case CAUSE_HYPERVISOR_ECALL:
case CAUSE_MACHINE_ECALL:
print_trap_information(tf);
@@ -216,11 +169,6 @@ void trap_handler(trapframe *tf)
print_trap_information(tf);
handle_misaligned_store(tf);
return;
- case CAUSE_SUPERVISOR_ECALL:
- /* Don't print so we make console putchar calls look
- the way they should */
- handle_supervisor_call(tf);
- return;
default:
printk(BIOS_EMERG, "================================\n");
printk(BIOS_EMERG, "coreboot: can not handle a trap:\n");
diff --git a/src/arch/riscv/virtual_memory.c b/src/arch/riscv/virtual_memory.c
index 1fff1d170a..27b4b82fcc 100644
--- a/src/arch/riscv/virtual_memory.c
+++ b/src/arch/riscv/virtual_memory.c
@@ -16,7 +16,6 @@
#include <arch/barrier.h>
#include <arch/encoding.h>
-#include <arch/sbi.h>
#include <atomic.h>
#include <console/console.h>
#include <stdint.h>
@@ -144,7 +143,6 @@ pte_t pte_create(uintptr_t ppn, int prot, int user)
// The current RISCV *physical* address space is this:
// * 0 - 2 GiB: miscellaneous IO devices
// * 2 GiB - 4 GiB DRAM
-// * top 2048 bytes of memory: SBI (which we round out to a 4K page)
// We have determined, also, that if code references a physical address
// not backed by a device, we'll take a fault. In other words, we don't
// need to finely map the memory-mapped devices as we would on an x86.
@@ -166,16 +164,11 @@ pte_t pte_create(uintptr_t ppn, int prot, int user)
// I.e. we use 1 GiB PTEs for 4 GiB.
// Linux/BSD uses this mapping just enough to replace it.
//
-// The SBI page is the last page in the 64 bit address space.
-// map that using the middle_pts shown below.
+// Top 2G map: map the 2 Gib - 4 GiB of physical address space to
+// 0xffffffff_80000000. This will be needed until the GNU toolchain can compile
+// code to run at 0xffffffc000000000, i.e. the start of Sv39.
//
-// Top 2G map, including SBI page: map the 2 Gib - 4 GiB of physical
-// address space to 0xffffffff_80000000. This will be needed until the
-// GNU toolchain can compile code to run at 0xffffffc000000000,
-// i.e. the start of Sv39.
-//
-// Only Harvey/Plan 9 uses this Mapping, and temporarily. It can
-// never be full removed as we need the 4KiB mapping for the SBI page.
+// Only Harvey/Plan 9 uses this Mapping, and temporarily.
//
// standard RISCV map long term: Map IO space, and all of DRAM, to the *lowest*
// possible negative address for this implementation,
@@ -187,15 +180,13 @@ pte_t pte_create(uintptr_t ppn, int prot, int user)
// It is our intent on Harvey (and eventually Akaros) that we use
// this map, once the toolchain can correctly support it.
// We have tested this arrangement and it lets us boot harvey to user mode.
-void init_vm(uintptr_t virtMemStart, uintptr_t physMemStart, pte_t *sbi_pt)
+void init_vm(uintptr_t virtMemStart, uintptr_t physMemStart, pte_t *pt)
{
- memset(sbi_pt, 0, RISCV_PGSIZE);
- // need to leave room for sbi page
// 0xFFF... - 0xFFFFFFFF81000000 - RISCV_PGSIZE
intptr_t memorySize = 0x7F000000;
// middle page table
- pte_t* middle_pt = (void*)sbi_pt + RISCV_PGSIZE;
+ pte_t* middle_pt = (void*)pt;
size_t num_middle_pts = 2; // 3 level page table, 39 bit virtual address space for now
// root page table
@@ -215,20 +206,6 @@ void init_vm(uintptr_t virtMemStart, uintptr_t physMemStart, pte_t *sbi_pt)
PTE_U|PTE_R|PTE_W|PTE_X, 0);
}
- // map SBI at top of vaddr space
- // only need to map a single page for sbi interface
- uintptr_t num_sbi_pages = 1;
- uintptr_t sbiStartAddress = (uintptr_t) &sbi_page;
- uintptr_t sbiAddr = sbiStartAddress;
- for (uintptr_t i = 0; i < num_sbi_pages; i++) {
- uintptr_t idx = (1 << RISCV_PGLEVEL_BITS) - num_sbi_pages + i;
- sbi_pt[idx] = pte_create(sbiAddr >> RISCV_PGSHIFT,
- PTE_R|PTE_X, 0);
- sbiAddr += RISCV_PGSIZE;
- }
- pte_t* sbi_pte = middle_pt + ((num_middle_pts << RISCV_PGLEVEL_BITS)-1);
- *sbi_pte = ptd_create((uintptr_t)sbi_pt >> RISCV_PGSHIFT);
-
// IO space. Identity mapped.
root_pt[0x000] = pte_create(0x00000000 >> RISCV_PGSHIFT,
PTE_R | PTE_W, 0);