Commit e6252e7f authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'mips_fixes_4.15_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

Pull MIPS fixes from James Hogan:
 "Some final MIPS fixes for 4.15, including important build fixes and a
  MAINTAINERS update:

   - Add myself as MIPS co-maintainer.

   - Fix various all*config build failures (particularly as a result of
     switching the default MIPS platform to the "generic" platform).

   - Fix GCC7 build failures (duplicate const and questionable calls to
     missing __multi3 intrinsic on mips64r6).

   - Fix warnings when CPU Idle is enabled (4.14).

   - Fix AR7 serial output (since 3.17).

   - Fix ralink platform_get_irq error checking (since 3.12)"

* tag 'mips_fixes_4.15_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
  MAINTAINERS: Add James as MIPS co-maintainer
  MIPS: Fix undefined reference to physical_memsize
  MIPS: Implement __multi3 for GCC7 MIPS64r6 builds
  MIPS: mm: Fix duplicate "const" on insn_table_MM
  MIPS: CM: Drop WARN_ON(vp != 0)
  MIPS: ralink: Fix platform_get_irq's error checking
  MIPS: Fix CPS SMP NS16550 UART defaults
  MIPS: BCM47XX Avoid compile error with MIPS allnoconfig
  MIPS: RB532: Avoid undefined mac_pton without GENERIC_NET_UTILS
  MIPS: RB532: Avoid undefined early_serial_setup() without SERIAL_8250_CONSOLE
  MIPS: ath25: Avoid undefined early_serial_setup() without SERIAL_8250_CONSOLE
  MIPS: AR7: ensure the port type's FCR value is used
parents 8dd903d2 18696edc
......@@ -9085,6 +9085,7 @@ F: drivers/usb/image/microtek.*
MIPS
M: Ralf Baechle <ralf@linux-mips.org>
M: James Hogan <jhogan@kernel.org>
L: linux-mips@linux-mips.org
W: http://www.linux-mips.org/
T: git git://git.linux-mips.org/pub/scm/ralf/linux.git
......
......@@ -259,6 +259,7 @@ config BCM47XX
select LEDS_GPIO_REGISTER
select BCM47XX_NVRAM
select BCM47XX_SPROM
select BCM47XX_SSB if !BCM47XX_BCMA
help
Support for BCM47XX based boards
......@@ -389,6 +390,7 @@ config LANTIQ
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_MIPS16
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_VPE_LOADER
select SYS_HAS_EARLY_PRINTK
select GPIOLIB
select SWAP_IO_SPACE
......@@ -516,6 +518,7 @@ config MIPS_MALTA
select SYS_SUPPORTS_MIPS16
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_SMARTMIPS
select SYS_SUPPORTS_VPE_LOADER
select SYS_SUPPORTS_ZBOOT
select SYS_SUPPORTS_RELOCATABLE
select USE_OF
......@@ -2281,9 +2284,16 @@ config MIPSR2_TO_R6_EMULATOR
The only reason this is a build-time option is to save ~14K from the
final kernel image.
config SYS_SUPPORTS_VPE_LOADER
bool
depends on SYS_SUPPORTS_MULTITHREADING
help
Indicates that the platform supports the VPE loader, and provides
physical_memsize.
config MIPS_VPE_LOADER
bool "VPE loader support."
depends on SYS_SUPPORTS_MULTITHREADING && MODULES
depends on SYS_SUPPORTS_VPE_LOADER && MODULES
select CPU_MIPSR2_IRQ_VI
select CPU_MIPSR2_IRQ_EI
select MIPS_MT
......
......@@ -124,30 +124,36 @@ config SCACHE_DEBUGFS
If unsure, say N.
menuconfig MIPS_CPS_NS16550
menuconfig MIPS_CPS_NS16550_BOOL
bool "CPS SMP NS16550 UART output"
depends on MIPS_CPS
help
Output debug information via an ns16550 compatible UART if exceptions
occur early in the boot process of a secondary core.
if MIPS_CPS_NS16550
if MIPS_CPS_NS16550_BOOL
config MIPS_CPS_NS16550
def_bool MIPS_CPS_NS16550_BASE != 0
config MIPS_CPS_NS16550_BASE
hex "UART Base Address"
default 0x1b0003f8 if MIPS_MALTA
default 0
help
The base address of the ns16550 compatible UART on which to output
debug information from the early stages of core startup.
This is only used if non-zero.
config MIPS_CPS_NS16550_SHIFT
int "UART Register Shift"
default 0 if MIPS_MALTA
default 0
help
The number of bits to shift ns16550 register indices by in order to
form their addresses. That is, log base 2 of the span between
adjacent ns16550 registers in the system.
endif # MIPS_CPS_NS16550
endif # MIPS_CPS_NS16550_BOOL
endmenu
......@@ -575,7 +575,7 @@ static int __init ar7_register_uarts(void)
uart_port.type = PORT_AR7;
uart_port.uartclk = clk_get_rate(bus_clk) / 2;
uart_port.iotype = UPIO_MEM32;
uart_port.flags = UPF_FIXED_TYPE;
uart_port.flags = UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF;
uart_port.regshift = 2;
uart_port.line = 0;
......
......@@ -73,6 +73,7 @@ const char *get_system_type(void)
void __init ath25_serial_setup(u32 mapbase, int irq, unsigned int uartclk)
{
#ifdef CONFIG_SERIAL_8250_CONSOLE
struct uart_port s;
memset(&s, 0, sizeof(s));
......@@ -85,6 +86,7 @@ void __init ath25_serial_setup(u32 mapbase, int irq, unsigned int uartclk)
s.uartclk = uartclk;
early_serial_setup(&s);
#endif /* CONFIG_SERIAL_8250_CONSOLE */
}
int __init ath25_add_wmac(int nr, u32 base, int irq)
......
......@@ -292,7 +292,6 @@ void mips_cm_lock_other(unsigned int cluster, unsigned int core,
*this_cpu_ptr(&cm_core_lock_flags));
} else {
WARN_ON(cluster != 0);
WARN_ON(vp != 0);
WARN_ON(block != CM_GCR_Cx_OTHER_BLOCK_LOCAL);
/*
......
......@@ -16,4 +16,5 @@ obj-$(CONFIG_CPU_R3000) += r3k_dump_tlb.o
obj-$(CONFIG_CPU_TX39XX) += r3k_dump_tlb.o
# libgcc-style stuff needed in the kernel
obj-y += ashldi3.o ashrdi3.o bswapsi.o bswapdi.o cmpdi2.o lshrdi3.o ucmpdi2.o
obj-y += ashldi3.o ashrdi3.o bswapsi.o bswapdi.o cmpdi2.o lshrdi3.o multi3.o \
ucmpdi2.o
......@@ -10,10 +10,18 @@ typedef int word_type __attribute__ ((mode (__word__)));
struct DWstruct {
int high, low;
};
struct TWstruct {
long long high, low;
};
#elif defined(__LITTLE_ENDIAN)
struct DWstruct {
int low, high;
};
struct TWstruct {
long long low, high;
};
#else
#error I feel sick.
#endif
......@@ -23,4 +31,13 @@ typedef union {
long long ll;
} DWunion;
#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPSR6)
typedef int ti_type __attribute__((mode(TI)));
typedef union {
struct TWstruct s;
ti_type ti;
} TWunion;
#endif
#endif /* __ASM_LIBGCC_H */
// SPDX-License-Identifier: GPL-2.0
#include <linux/export.h>
#include "libgcc.h"
/*
* GCC 7 suboptimally generates __multi3 calls for mips64r6, so for that
* specific case only we'll implement it here.
*
* See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981
*/
#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPSR6) && (__GNUC__ == 7)
/* multiply 64-bit values, low 64-bits returned */
static inline long long notrace dmulu(long long a, long long b)
{
long long res;
asm ("dmulu %0,%1,%2" : "=r" (res) : "r" (a), "r" (b));
return res;
}
/* multiply 64-bit unsigned values, high 64-bits of 128-bit result returned */
static inline long long notrace dmuhu(long long a, long long b)
{
long long res;
asm ("dmuhu %0,%1,%2" : "=r" (res) : "r" (a), "r" (b));
return res;
}
/* multiply 128-bit values, low 128-bits returned */
ti_type notrace __multi3(ti_type a, ti_type b)
{
TWunion res, aa, bb;
aa.ti = a;
bb.ti = b;
/*
* a * b = (a.lo * b.lo)
* + 2^64 * (a.hi * b.lo + a.lo * b.hi)
* [+ 2^128 * (a.hi * b.hi)]
*/
res.s.low = dmulu(aa.s.low, bb.s.low);
res.s.high = dmuhu(aa.s.low, bb.s.low);
res.s.high += dmulu(aa.s.high, bb.s.low);
res.s.high += dmulu(aa.s.low, bb.s.high);
return res.ti;
}
EXPORT_SYMBOL(__multi3);
#endif /* 64BIT && CPU_MIPSR6 && GCC7 */
......@@ -40,7 +40,7 @@
#include "uasm.c"
static const struct insn const insn_table_MM[insn_invalid] = {
static const struct insn insn_table_MM[insn_invalid] = {
[insn_addu] = {M(mm_pool32a_op, 0, 0, 0, 0, mm_addu32_op), RT | RS | RD},
[insn_addiu] = {M(mm_addiu32_op, 0, 0, 0, 0, 0), RT | RS | SIMM},
[insn_and] = {M(mm_pool32a_op, 0, 0, 0, 0, mm_and_op), RT | RS | RD},
......
......@@ -109,9 +109,9 @@ static int rt_timer_probe(struct platform_device *pdev)
}
rt->irq = platform_get_irq(pdev, 0);
if (!rt->irq) {
if (rt->irq < 0) {
dev_err(&pdev->dev, "failed to load irq\n");
return -ENOENT;
return rt->irq;
}
rt->membase = devm_ioremap_resource(&pdev->dev, res);
......
......@@ -2,4 +2,6 @@
# Makefile for the RB532 board specific parts of the kernel
#
obj-y += irq.o time.o setup.o serial.o prom.o gpio.o devices.o
obj-$(CONFIG_SERIAL_8250_CONSOLE) += serial.o
obj-y += irq.o time.o setup.o prom.o gpio.o devices.o
......@@ -310,6 +310,8 @@ static int __init plat_setup_devices(void)
return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
}
#ifdef CONFIG_NET
static int __init setup_kmac(char *s)
{
printk(KERN_INFO "korina mac = %s\n", s);
......@@ -322,4 +324,6 @@ static int __init setup_kmac(char *s)
__setup("kmac=", setup_kmac);
#endif /* CONFIG_NET */
arch_initcall(plat_setup_devices);
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