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121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/*
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* PB926 platform-specific initialisation and setup
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#include <l4/generic/platform.h>
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#include <l4/generic/space.h>
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#include <l4/generic/irq.h>
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#include <l4/generic/bootmem.h>
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#include INC_ARCH(linker.h)
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#include INC_PLAT(printascii.h)
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#include INC_SUBARCH(mm.h)
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#include INC_SUBARCH(mmu_ops.h)
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#include INC_GLUE(memory.h)
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#include INC_GLUE(memlayout.h)
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#include INC_PLAT(offsets.h)
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#include INC_PLAT(platform.h)
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#include INC_PLAT(uart.h)
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#include INC_PLAT(irq.h)
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#include INC_ARCH(asm.h)
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/*
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* The devices that are used by the kernel are mapped
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* independent of these capabilities, but these provide a
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* concise description of what is used by the kernel.
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*/
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int platform_setup_device_caps(struct kernel_resources *kres)
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{
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struct capability *uart[4], *timer[2];
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/* Setup capabilities for userspace uarts and timers */
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uart[1] = alloc_bootmem(sizeof(*uart[1]), 0);
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uart[1]->start = __pfn(PB926_UART1_BASE);
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uart[1]->end = uart[1]->start + 1;
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uart[1]->size = uart[1]->end - uart[1]->start;
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cap_set_devtype(uart[1], CAP_DEVTYPE_UART);
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cap_set_devnum(uart[1], 1);
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link_init(&uart[1]->list);
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cap_list_insert(uart[1], &kres->devmem_free);
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uart[2] = alloc_bootmem(sizeof(*uart[2]), 0);
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uart[2]->start = __pfn(PB926_UART2_BASE);
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uart[2]->end = uart[2]->start + 1;
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uart[2]->size = uart[2]->end - uart[2]->start;
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cap_set_devtype(uart[2], CAP_DEVTYPE_UART);
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cap_set_devnum(uart[2], 2);
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link_init(&uart[2]->list);
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cap_list_insert(uart[2], &kres->devmem_free);
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uart[3] = alloc_bootmem(sizeof(*uart[3]), 0);
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uart[3]->start = __pfn(PB926_UART3_BASE);
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uart[3]->end = uart[3]->start + 1;
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uart[3]->size = uart[3]->end - uart[3]->start;
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cap_set_devtype(uart[3], CAP_DEVTYPE_UART);
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cap_set_devnum(uart[3], 3);
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link_init(&uart[3]->list);
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cap_list_insert(uart[3], &kres->devmem_free);
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/* Setup timer1 capability as free */
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timer[1] = alloc_bootmem(sizeof(*timer[1]), 0);
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timer[1]->start = __pfn(PB926_TIMER23_BASE);
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timer[1]->end = timer[1]->start + 1;
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timer[1]->size = timer[1]->end - timer[1]->start;
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cap_set_devtype(timer[1], CAP_DEVTYPE_TIMER);
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cap_set_devnum(timer[1], 1);
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link_init(&timer[1]->list);
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cap_list_insert(timer[1], &kres->devmem_free);
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return 0;
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}
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/* We will use UART0 for kernel as well as user tasks, so map it to kernel and user space */
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void init_platform_console(void)
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{
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add_boot_mapping(PB926_UART0_BASE, PLATFORM_CONSOLE0_BASE, PAGE_SIZE,
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MAP_IO_DEFAULT_FLAGS);
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/*
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* Map same UART IO area to userspace so that primitive uart-based
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* userspace printf can work. Note, this raw mapping is to be
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* removed in the future, when file-based io is implemented.
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*/
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add_boot_mapping(PB926_UART0_BASE, USERSPACE_UART_BASE, PAGE_SIZE,
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MAP_USR_IO_FLAGS);
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uart_init();
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}
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/*
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* We are using TIMER0 only, so we map TIMER0 base,
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* incase any other timer is needed we need to map it
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* to userspace or kernel space as needed
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*/
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void init_platform_timer(void)
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{
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add_boot_mapping(PB926_TIMER01_BASE, PLATFORM_TIMER0_BASE, PAGE_SIZE,
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MAP_IO_DEFAULT_FLAGS);
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add_boot_mapping(PB926_SYSCTRL_BASE, PB926_SYSCTRL_VBASE, PAGE_SIZE,
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MAP_IO_DEFAULT_FLAGS);
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timer_init();
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}
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void init_platform_irq_controller()
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{
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add_boot_mapping(PB926_VIC_BASE, PLATFORM_IRQCTRL_BASE, PAGE_SIZE,
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MAP_IO_DEFAULT_FLAGS);
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add_boot_mapping(PB926_SIC_BASE, PLATFORM_SIRQCTRL_BASE, PAGE_SIZE,
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MAP_IO_DEFAULT_FLAGS);
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irq_controllers_init();
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}
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void platform_init(void)
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{
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init_platform_console();
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init_platform_timer();
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init_platform_irq_controller();
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}
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