cc3ae7b0af
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. One module.h was converted to moduleparam.h since the file had multiple module_param() in it, and another file had an instance of MODULE_DEVICE_TABLE deleted, since that is a no-op when builtin. Finally, the 32 bit build coverage of olpc_ofw revealed a couple implicit includes, which were pretty self evident to fix based on what gcc was complaining about. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-6-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
169 lines
4.6 KiB
C
169 lines
4.6 KiB
C
/*
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* Intel CE4100 platform specific setup code
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*
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* (C) Copyright 2010 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/irq.h>
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#include <linux/init.h>
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#include <linux/reboot.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_8250.h>
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#include <linux/reboot.h>
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#include <asm/ce4100.h>
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#include <asm/prom.h>
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#include <asm/setup.h>
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#include <asm/i8259.h>
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#include <asm/io.h>
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#include <asm/io_apic.h>
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#include <asm/emergency-restart.h>
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static int ce4100_i8042_detect(void)
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{
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return 0;
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}
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/*
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* The CE4100 platform has an internal 8051 Microcontroller which is
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* responsible for signaling to the external Power Management Unit the
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* intention to reset, reboot or power off the system. This 8051 device has
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* its command register mapped at I/O port 0xcf9 and the value 0x4 is used
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* to power off the system.
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*/
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static void ce4100_power_off(void)
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{
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outb(0x4, 0xcf9);
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}
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#ifdef CONFIG_SERIAL_8250
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static unsigned int mem_serial_in(struct uart_port *p, int offset)
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{
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offset = offset << p->regshift;
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return readl(p->membase + offset);
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}
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/*
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* The UART Tx interrupts are not set under some conditions and therefore serial
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* transmission hangs. This is a silicon issue and has not been root caused. The
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* workaround for this silicon issue checks UART_LSR_THRE bit and UART_LSR_TEMT
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* bit of LSR register in interrupt handler to see whether at least one of these
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* two bits is set, if so then process the transmit request. If this workaround
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* is not applied, then the serial transmission may hang. This workaround is for
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* errata number 9 in Errata - B step.
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*/
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static unsigned int ce4100_mem_serial_in(struct uart_port *p, int offset)
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{
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unsigned int ret, ier, lsr;
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if (offset == UART_IIR) {
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offset = offset << p->regshift;
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ret = readl(p->membase + offset);
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if (ret & UART_IIR_NO_INT) {
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/* see if the TX interrupt should have really set */
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ier = mem_serial_in(p, UART_IER);
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/* see if the UART's XMIT interrupt is enabled */
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if (ier & UART_IER_THRI) {
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lsr = mem_serial_in(p, UART_LSR);
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/* now check to see if the UART should be
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generating an interrupt (but isn't) */
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if (lsr & (UART_LSR_THRE | UART_LSR_TEMT))
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ret &= ~UART_IIR_NO_INT;
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}
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}
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} else
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ret = mem_serial_in(p, offset);
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return ret;
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}
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static void ce4100_mem_serial_out(struct uart_port *p, int offset, int value)
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{
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offset = offset << p->regshift;
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writel(value, p->membase + offset);
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}
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static void ce4100_serial_fixup(int port, struct uart_port *up,
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unsigned short *capabilites)
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{
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#ifdef CONFIG_EARLY_PRINTK
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/*
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* Over ride the legacy port configuration that comes from
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* asm/serial.h. Using the ioport driver then switching to the
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* PCI memmaped driver hangs the IOAPIC
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*/
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if (up->iotype != UPIO_MEM32) {
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up->uartclk = 14745600;
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up->mapbase = 0xdffe0200;
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set_fixmap_nocache(FIX_EARLYCON_MEM_BASE,
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up->mapbase & PAGE_MASK);
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up->membase =
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(void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
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up->membase += up->mapbase & ~PAGE_MASK;
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up->mapbase += port * 0x100;
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up->membase += port * 0x100;
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up->iotype = UPIO_MEM32;
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up->regshift = 2;
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up->irq = 4;
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}
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#endif
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up->iobase = 0;
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up->serial_in = ce4100_mem_serial_in;
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up->serial_out = ce4100_mem_serial_out;
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*capabilites |= (1 << 12);
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}
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static __init void sdv_serial_fixup(void)
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{
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serial8250_set_isa_configurator(ce4100_serial_fixup);
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}
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#else
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static inline void sdv_serial_fixup(void) {};
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#endif
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static void __init sdv_arch_setup(void)
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{
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sdv_serial_fixup();
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}
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static void sdv_pci_init(void)
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{
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x86_of_pci_init();
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}
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/*
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* CE4100 specific x86_init function overrides and early setup
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* calls.
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*/
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void __init x86_ce4100_early_setup(void)
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{
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x86_init.oem.arch_setup = sdv_arch_setup;
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x86_platform.i8042_detect = ce4100_i8042_detect;
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x86_init.resources.probe_roms = x86_init_noop;
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x86_init.mpparse.get_smp_config = x86_init_uint_noop;
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x86_init.mpparse.find_smp_config = x86_init_noop;
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x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
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x86_init.pci.init = ce4100_pci_init;
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x86_init.pci.init_irq = sdv_pci_init;
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/*
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* By default, the reboot method is ACPI which is supported by the
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* CE4100 bootloader CEFDK using FADT.ResetReg Address and ResetValue
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* the bootloader will however issue a system power off instead of
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* reboot. By using BOOT_KBD we ensure proper system reboot as
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* expected.
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*/
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reboot_type = BOOT_KBD;
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pm_power_off = ce4100_power_off;
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}
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