Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 473 deletions

diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
deleted file mode 100644
index cf773f0f1f30..000000000000
--- a/arch/blackfin/kernel/kgdb.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/*
- * arch/blackfin/kernel/kgdb.c - Blackfin kgdb pieces
- *
- * Copyright 2005-2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/ptrace.h>		/* for linux pt_regs struct */
-#include <linux/kgdb.h>
-#include <linux/uaccess.h>
-#include <asm/irq_regs.h>
-
-void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
-{
-	gdb_regs[BFIN_R0] = regs->r0;
-	gdb_regs[BFIN_R1] = regs->r1;
-	gdb_regs[BFIN_R2] = regs->r2;
-	gdb_regs[BFIN_R3] = regs->r3;
-	gdb_regs[BFIN_R4] = regs->r4;
-	gdb_regs[BFIN_R5] = regs->r5;
-	gdb_regs[BFIN_R6] = regs->r6;
-	gdb_regs[BFIN_R7] = regs->r7;
-	gdb_regs[BFIN_P0] = regs->p0;
-	gdb_regs[BFIN_P1] = regs->p1;
-	gdb_regs[BFIN_P2] = regs->p2;
-	gdb_regs[BFIN_P3] = regs->p3;
-	gdb_regs[BFIN_P4] = regs->p4;
-	gdb_regs[BFIN_P5] = regs->p5;
-	gdb_regs[BFIN_SP] = regs->reserved;
-	gdb_regs[BFIN_FP] = regs->fp;
-	gdb_regs[BFIN_I0] = regs->i0;
-	gdb_regs[BFIN_I1] = regs->i1;
-	gdb_regs[BFIN_I2] = regs->i2;
-	gdb_regs[BFIN_I3] = regs->i3;
-	gdb_regs[BFIN_M0] = regs->m0;
-	gdb_regs[BFIN_M1] = regs->m1;
-	gdb_regs[BFIN_M2] = regs->m2;
-	gdb_regs[BFIN_M3] = regs->m3;
-	gdb_regs[BFIN_B0] = regs->b0;
-	gdb_regs[BFIN_B1] = regs->b1;
-	gdb_regs[BFIN_B2] = regs->b2;
-	gdb_regs[BFIN_B3] = regs->b3;
-	gdb_regs[BFIN_L0] = regs->l0;
-	gdb_regs[BFIN_L1] = regs->l1;
-	gdb_regs[BFIN_L2] = regs->l2;
-	gdb_regs[BFIN_L3] = regs->l3;
-	gdb_regs[BFIN_A0_DOT_X] = regs->a0x;
-	gdb_regs[BFIN_A0_DOT_W] = regs->a0w;
-	gdb_regs[BFIN_A1_DOT_X] = regs->a1x;
-	gdb_regs[BFIN_A1_DOT_W] = regs->a1w;
-	gdb_regs[BFIN_ASTAT] = regs->astat;
-	gdb_regs[BFIN_RETS] = regs->rets;
-	gdb_regs[BFIN_LC0] = regs->lc0;
-	gdb_regs[BFIN_LT0] = regs->lt0;
-	gdb_regs[BFIN_LB0] = regs->lb0;
-	gdb_regs[BFIN_LC1] = regs->lc1;
-	gdb_regs[BFIN_LT1] = regs->lt1;
-	gdb_regs[BFIN_LB1] = regs->lb1;
-	gdb_regs[BFIN_CYCLES] = 0;
-	gdb_regs[BFIN_CYCLES2] = 0;
-	gdb_regs[BFIN_USP] = regs->usp;
-	gdb_regs[BFIN_SEQSTAT] = regs->seqstat;
-	gdb_regs[BFIN_SYSCFG] = regs->syscfg;
-	gdb_regs[BFIN_RETI] = regs->pc;
-	gdb_regs[BFIN_RETX] = regs->retx;
-	gdb_regs[BFIN_RETN] = regs->retn;
-	gdb_regs[BFIN_RETE] = regs->rete;
-	gdb_regs[BFIN_PC] = regs->pc;
-	gdb_regs[BFIN_CC] = (regs->astat >> 5) & 1;
-	gdb_regs[BFIN_EXTRA1] = 0;
-	gdb_regs[BFIN_EXTRA2] = 0;
-	gdb_regs[BFIN_EXTRA3] = 0;
-	gdb_regs[BFIN_IPEND] = regs->ipend;
-}
-
-/*
- * Extracts ebp, esp and eip values understandable by gdb from the values
- * saved by switch_to.
- * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp
- * prior to entering switch_to is 8 greater than the value that is saved.
- * If switch_to changes, change following code appropriately.
- */
-void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
-{
-	gdb_regs[BFIN_SP] = p->thread.ksp;
-	gdb_regs[BFIN_PC] = p->thread.pc;
-	gdb_regs[BFIN_SEQSTAT] = p->thread.seqstat;
-}
-
-void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
-{
-	regs->r0 = gdb_regs[BFIN_R0];
-	regs->r1 = gdb_regs[BFIN_R1];
-	regs->r2 = gdb_regs[BFIN_R2];
-	regs->r3 = gdb_regs[BFIN_R3];
-	regs->r4 = gdb_regs[BFIN_R4];
-	regs->r5 = gdb_regs[BFIN_R5];
-	regs->r6 = gdb_regs[BFIN_R6];
-	regs->r7 = gdb_regs[BFIN_R7];
-	regs->p0 = gdb_regs[BFIN_P0];
-	regs->p1 = gdb_regs[BFIN_P1];
-	regs->p2 = gdb_regs[BFIN_P2];
-	regs->p3 = gdb_regs[BFIN_P3];
-	regs->p4 = gdb_regs[BFIN_P4];
-	regs->p5 = gdb_regs[BFIN_P5];
-	regs->fp = gdb_regs[BFIN_FP];
-	regs->i0 = gdb_regs[BFIN_I0];
-	regs->i1 = gdb_regs[BFIN_I1];
-	regs->i2 = gdb_regs[BFIN_I2];
-	regs->i3 = gdb_regs[BFIN_I3];
-	regs->m0 = gdb_regs[BFIN_M0];
-	regs->m1 = gdb_regs[BFIN_M1];
-	regs->m2 = gdb_regs[BFIN_M2];
-	regs->m3 = gdb_regs[BFIN_M3];
-	regs->b0 = gdb_regs[BFIN_B0];
-	regs->b1 = gdb_regs[BFIN_B1];
-	regs->b2 = gdb_regs[BFIN_B2];
-	regs->b3 = gdb_regs[BFIN_B3];
-	regs->l0 = gdb_regs[BFIN_L0];
-	regs->l1 = gdb_regs[BFIN_L1];
-	regs->l2 = gdb_regs[BFIN_L2];
-	regs->l3 = gdb_regs[BFIN_L3];
-	regs->a0x = gdb_regs[BFIN_A0_DOT_X];
-	regs->a0w = gdb_regs[BFIN_A0_DOT_W];
-	regs->a1x = gdb_regs[BFIN_A1_DOT_X];
-	regs->a1w = gdb_regs[BFIN_A1_DOT_W];
-	regs->rets = gdb_regs[BFIN_RETS];
-	regs->lc0 = gdb_regs[BFIN_LC0];
-	regs->lt0 = gdb_regs[BFIN_LT0];
-	regs->lb0 = gdb_regs[BFIN_LB0];
-	regs->lc1 = gdb_regs[BFIN_LC1];
-	regs->lt1 = gdb_regs[BFIN_LT1];
-	regs->lb1 = gdb_regs[BFIN_LB1];
-	regs->usp = gdb_regs[BFIN_USP];
-	regs->syscfg = gdb_regs[BFIN_SYSCFG];
-	regs->retx = gdb_regs[BFIN_RETX];
-	regs->retn = gdb_regs[BFIN_RETN];
-	regs->rete = gdb_regs[BFIN_RETE];
-	regs->pc = gdb_regs[BFIN_PC];
-
-#if 0				/* can't change these */
-	regs->astat = gdb_regs[BFIN_ASTAT];
-	regs->seqstat = gdb_regs[BFIN_SEQSTAT];
-	regs->ipend = gdb_regs[BFIN_IPEND];
-#endif
-}
-
-static struct hw_breakpoint {
-	unsigned int occupied:1;
-	unsigned int skip:1;
-	unsigned int enabled:1;
-	unsigned int type:1;
-	unsigned int dataacc:2;
-	unsigned short count;
-	unsigned int addr;
-} breakinfo[HW_WATCHPOINT_NUM];
-
-static int bfin_set_hw_break(unsigned long addr, int len, enum kgdb_bptype type)
-{
-	int breakno;
-	int bfin_type;
-	int dataacc = 0;
-
-	switch (type) {
-	case BP_HARDWARE_BREAKPOINT:
-		bfin_type = TYPE_INST_WATCHPOINT;
-		break;
-	case BP_WRITE_WATCHPOINT:
-		dataacc = 1;
-		bfin_type = TYPE_DATA_WATCHPOINT;
-		break;
-	case BP_READ_WATCHPOINT:
-		dataacc = 2;
-		bfin_type = TYPE_DATA_WATCHPOINT;
-		break;
-	case BP_ACCESS_WATCHPOINT:
-		dataacc = 3;
-		bfin_type = TYPE_DATA_WATCHPOINT;
-		break;
-	default:
-		return -ENOSPC;
-	}
-
-	/* Because hardware data watchpoint impelemented in current
-	 * Blackfin can not trigger an exception event as the hardware
-	 * instrction watchpoint does, we ignaore all data watch point here.
-	 * They can be turned on easily after future blackfin design
-	 * supports this feature.
-	 */
-	for (breakno = 0; breakno < HW_INST_WATCHPOINT_NUM; breakno++)
-		if (bfin_type == breakinfo[breakno].type
-			&& !breakinfo[breakno].occupied) {
-			breakinfo[breakno].occupied = 1;
-			breakinfo[breakno].skip = 0;
-			breakinfo[breakno].enabled = 1;
-			breakinfo[breakno].addr = addr;
-			breakinfo[breakno].dataacc = dataacc;
-			breakinfo[breakno].count = 0;
-			return 0;
-		}
-
-	return -ENOSPC;
-}
-
-static int bfin_remove_hw_break(unsigned long addr, int len, enum kgdb_bptype type)
-{
-	int breakno;
-	int bfin_type;
-
-	switch (type) {
-	case BP_HARDWARE_BREAKPOINT:
-		bfin_type = TYPE_INST_WATCHPOINT;
-		break;
-	case BP_WRITE_WATCHPOINT:
-	case BP_READ_WATCHPOINT:
-	case BP_ACCESS_WATCHPOINT:
-		bfin_type = TYPE_DATA_WATCHPOINT;
-		break;
-	default:
-		return 0;
-	}
-	for (breakno = 0; breakno < HW_WATCHPOINT_NUM; breakno++)
-		if (bfin_type == breakinfo[breakno].type
-			&& breakinfo[breakno].occupied
-			&& breakinfo[breakno].addr == addr) {
-			breakinfo[breakno].occupied = 0;
-			breakinfo[breakno].enabled = 0;
-		}
-
-	return 0;
-}
-
-static void bfin_remove_all_hw_break(void)
-{
-	int breakno;
-
-	memset(breakinfo, 0, sizeof(struct hw_breakpoint)*HW_WATCHPOINT_NUM);
-
-	for (breakno = 0; breakno < HW_INST_WATCHPOINT_NUM; breakno++)
-		breakinfo[breakno].type = TYPE_INST_WATCHPOINT;
-	for (; breakno < HW_WATCHPOINT_NUM; breakno++)
-		breakinfo[breakno].type = TYPE_DATA_WATCHPOINT;
-}
-
-static void bfin_correct_hw_break(void)
-{
-	int breakno;
-	unsigned int wpiactl = 0;
-	unsigned int wpdactl = 0;
-	int enable_wp = 0;
-
-	for (breakno = 0; breakno < HW_WATCHPOINT_NUM; breakno++)
-		if (breakinfo[breakno].enabled) {
-			enable_wp = 1;
-
-			switch (breakno) {
-			case 0:
-				wpiactl |= WPIAEN0|WPICNTEN0;
-				bfin_write_WPIA0(breakinfo[breakno].addr);
-				bfin_write_WPIACNT0(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 1:
-				wpiactl |= WPIAEN1|WPICNTEN1;
-				bfin_write_WPIA1(breakinfo[breakno].addr);
-				bfin_write_WPIACNT1(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 2:
-				wpiactl |= WPIAEN2|WPICNTEN2;
-				bfin_write_WPIA2(breakinfo[breakno].addr);
-				bfin_write_WPIACNT2(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 3:
-				wpiactl |= WPIAEN3|WPICNTEN3;
-				bfin_write_WPIA3(breakinfo[breakno].addr);
-				bfin_write_WPIACNT3(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 4:
-				wpiactl |= WPIAEN4|WPICNTEN4;
-				bfin_write_WPIA4(breakinfo[breakno].addr);
-				bfin_write_WPIACNT4(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 5:
-				wpiactl |= WPIAEN5|WPICNTEN5;
-				bfin_write_WPIA5(breakinfo[breakno].addr);
-				bfin_write_WPIACNT5(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 6:
-				wpdactl |= WPDAEN0|WPDCNTEN0|WPDSRC0;
-				wpdactl |= breakinfo[breakno].dataacc
-					<< WPDACC0_OFFSET;
-				bfin_write_WPDA0(breakinfo[breakno].addr);
-				bfin_write_WPDACNT0(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			case 7:
-				wpdactl |= WPDAEN1|WPDCNTEN1|WPDSRC1;
-				wpdactl |= breakinfo[breakno].dataacc
-					<< WPDACC1_OFFSET;
-				bfin_write_WPDA1(breakinfo[breakno].addr);
-				bfin_write_WPDACNT1(breakinfo[breakno].count
-					+ breakinfo->skip);
-				break;
-			}
-		}
-
-	/* Should enable WPPWR bit first before set any other
-	 * WPIACTL and WPDACTL bits */
-	if (enable_wp) {
-		bfin_write_WPIACTL(WPPWR);
-		CSYNC();
-		bfin_write_WPIACTL(wpiactl|WPPWR);
-		bfin_write_WPDACTL(wpdactl);
-		CSYNC();
-	}
-}
-
-static void bfin_disable_hw_debug(struct pt_regs *regs)
-{
-	/* Disable hardware debugging while we are in kgdb */
-	bfin_write_WPIACTL(0);
-	bfin_write_WPDACTL(0);
-	CSYNC();
-}
-
-#ifdef CONFIG_SMP
-void kgdb_passive_cpu_callback(void *info)
-{
-	kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
-}
-
-void kgdb_roundup_cpus(unsigned long flags)
-{
-	unsigned int cpu;
-
-	for (cpu = cpumask_first(cpu_online_mask); cpu < nr_cpu_ids;
-		cpu = cpumask_next(cpu, cpu_online_mask))
-		smp_call_function_single(cpu, kgdb_passive_cpu_callback,
-					 NULL, 0);
-}
-
-void kgdb_roundup_cpu(int cpu, unsigned long flags)
-{
-	smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0);
-}
-#endif
-
-#ifdef CONFIG_IPIPE
-static unsigned long kgdb_arch_imask;
-#endif
-
-int kgdb_arch_handle_exception(int vector, int signo,
-			       int err_code, char *remcom_in_buffer,
-			       char *remcom_out_buffer,
-			       struct pt_regs *regs)
-{
-	long addr;
-	char *ptr;
-	int newPC;
-	int i;
-
-	switch (remcom_in_buffer[0]) {
-	case 'c':
-	case 's':
-		if (kgdb_contthread && kgdb_contthread != current) {
-			strcpy(remcom_out_buffer, "E00");
-			break;
-		}
-
-		kgdb_contthread = NULL;
-
-		/* try to read optional parameter, pc unchanged if no parm */
-		ptr = &remcom_in_buffer[1];
-		if (kgdb_hex2long(&ptr, &addr)) {
-			regs->retx = addr;
-		}
-		newPC = regs->retx;
-
-		/* clear the trace bit */
-		regs->syscfg &= 0xfffffffe;
-
-		/* set the trace bit if we're stepping */
-		if (remcom_in_buffer[0] == 's') {
-			regs->syscfg |= 0x1;
-			kgdb_single_step = regs->ipend;
-			kgdb_single_step >>= 6;
-			for (i = 10; i > 0; i--, kgdb_single_step >>= 1)
-				if (kgdb_single_step & 1)
-					break;
-			/* i indicate event priority of current stopped instruction
-			 * user space instruction is 0, IVG15 is 1, IVTMR is 10.
-			 * kgdb_single_step > 0 means in single step mode
-			 */
-			kgdb_single_step = i + 1;
-
-			preempt_disable();
-#ifdef CONFIG_IPIPE
-			kgdb_arch_imask = cpu_pda[raw_smp_processor_id()].ex_imask;
-			cpu_pda[raw_smp_processor_id()].ex_imask = 0;
-#endif
-		}
-
-		bfin_correct_hw_break();
-
-		return 0;
-	}			/* switch */
-	return -1;		/* this means that we do not want to exit from the handler */
-}
-
-struct kgdb_arch arch_kgdb_ops = {
-	.gdb_bpt_instr = {0xa1},
-	.flags = KGDB_HW_BREAKPOINT,
-	.set_hw_breakpoint = bfin_set_hw_break,
-	.remove_hw_breakpoint = bfin_remove_hw_break,
-	.disable_hw_break = bfin_disable_hw_debug,
-	.remove_all_hw_break = bfin_remove_all_hw_break,
-	.correct_hw_break = bfin_correct_hw_break,
-};
-
-#define IN_MEM(addr, size, l1_addr, l1_size) \
-({ \
-	unsigned long __addr = (unsigned long)(addr); \
-	(l1_size && __addr >= l1_addr && __addr + (size) <= l1_addr + l1_size); \
-})
-#define ASYNC_BANK_SIZE \
-	(ASYNC_BANK0_SIZE + ASYNC_BANK1_SIZE + \
-	 ASYNC_BANK2_SIZE + ASYNC_BANK3_SIZE)
-
-int kgdb_validate_break_address(unsigned long addr)
-{
-	int cpu = raw_smp_processor_id();
-
-	if (addr >= 0x1000 && (addr + BREAK_INSTR_SIZE) <= physical_mem_end)
-		return 0;
-	if (IN_MEM(addr, BREAK_INSTR_SIZE, ASYNC_BANK0_BASE, ASYNC_BANK_SIZE))
-		return 0;
-	if (cpu == 0 && IN_MEM(addr, BREAK_INSTR_SIZE, L1_CODE_START, L1_CODE_LENGTH))
-		return 0;
-#ifdef CONFIG_SMP
-	else if (cpu == 1 && IN_MEM(addr, BREAK_INSTR_SIZE, COREB_L1_CODE_START, L1_CODE_LENGTH))
-		return 0;
-#endif
-	if (IN_MEM(addr, BREAK_INSTR_SIZE, L2_START, L2_LENGTH))
-		return 0;
-
-	return -EFAULT;
-}
-
-void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
-{
-	regs->retx = ip;
-}
-
-int kgdb_arch_init(void)
-{
-	kgdb_single_step = 0;
-#ifdef CONFIG_IPIPE
-	kgdb_arch_imask = 0;
-#endif
-
-	bfin_remove_all_hw_break();
-	return 0;
-}
-
-void kgdb_arch_exit(void)
-{
-}