165 lines
4.1 KiB
C
165 lines
4.1 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2014-04-07 Grissiom first version
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*/
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#ifndef __RTT_API_H__
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#define __RTT_API_H__
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/* 4MB in size */
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#define VMM_SIZE 0x400000
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#define VMM_END 0xc8000000
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#define VMM_BEGIN (VMM_END - VMM_SIZE)
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/* VMM Memory Map:
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*
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* --- VMM_BEGIN --- +------+
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* .vectors | 4KB |
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* .text.share | |
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* ----------------- + |
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* guest vector page | 4KB |
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* ----------------- + |
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* .data.share | 4KB |
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* ----------------- + |
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* .bss.share | 4KB |
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* -- SHARE_BASE -- + | 1MB
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* shared context | shared region
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* ----------------- |
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* blabla... |
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* ----------------- +------+
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* vmm text |
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* rodata |
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* blabla... |
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* ----------------- | private region
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* vmm data |
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* ----------------- |
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* vmm bss |
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* ---- VMM_END ---- +------+
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*
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*/
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/* 1MB is one level one page table entry, if we want to page table to be
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* simple(avoid TLB miss), we could allocate 1MB for shared memory. */
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#define VMM_SHARE_PGSZ (1024*1024)
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/* the size and position of shared code text */
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#define VMM_SHARE_TEXT_PGSZ 4096
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/* the size and position of vector's page size in Linux */
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#define LINUX_VECTOR_PGSZ 4096
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#define LINUX_VECTOR_POS (VMM_BEGIN + VMM_SHARE_TEXT_PGSZ)
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/* the size and position of shared code data */
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#define VMM_SHARE_DATA_PGSZ 4096
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#define VMM_SHARE_DATA_POS (LINUX_VECTOR_POS + LINUX_VECTOR_PGSZ)
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/* the size and position of shared code bss */
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#define VMM_SHARE_BSS_PGSZ 4096
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#define VMM_SHARE_BSS_POS (VMM_SHARE_DATA_POS + VMM_SHARE_DATA_PGSZ)
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/* the size and position of shared code bss */
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#define VMM_SHARE_CTX_PGSZ (VMM_SHARE_PGSZ - \
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LINUX_VECTOR_PGSZ - \
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VMM_SHARE_TEXT_PGSZ - \
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VMM_SHARE_DATA_PGSZ - \
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VMM_SHARE_BSS_PGSZ)
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#if VMM_SHARE_CTX_PGSZ <= 0
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#error
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#endif
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#define VMM_SHARE_CTX_POS (VMM_SHARE_BSS_POS + VMM_SHARE_BSS_PGSZ)
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/* the size of FIQ stack page size in RT-Thread */
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#define RT_FIQ_STACK_PGSZ 0
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/* the size of IRQ stack page size in RT-Thread */
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#define RT_IRQ_STACK_PGSZ 4096
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#ifdef HEAP_END
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#undef HEAP_END
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#endif
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#define HEAP_END (VMM_END)
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#define RT_VMM_VIRQ_TRIGGER 10
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#define RT_VMM_STACK_SIZE 1024
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/* the max number of iomap entries */
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#define RT_VMM_IOMAP_MAXNR 16
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#ifndef __iomem
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#define __iomem
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#endif
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#define IRQS_NR_32 ((96 + 31)/32)
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/*#define RT_VMM_USING_DOMAIN*/
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#ifndef __ASSEMBLY__
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/* keep consistent with linux/arch/arm/include/vmm/vmm.h */
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struct vmm_context
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{
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/* the status of vGuest irq, read only for RT-Thread */
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volatile unsigned long virq_status;
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/* has interrupt pended on vGuest OS IRQ */
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volatile unsigned long virq_pended;
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/* pending interrupt for vGuest OS */
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volatile unsigned long virq_pending[IRQS_NR_32];
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};
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struct vmm_domain
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{
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/* the number of kernel domain */
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char kernel;
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/* the number of user domain */
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char user;
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/* the number of io domain */
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char io;
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/* the number of vmm domain */
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char vmm;
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/* the number of vmm_share domain */
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char vmm_share;
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};
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struct vmm_iomap
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{
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const char name[16]; /* iomap name */
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unsigned long pa; /* physical address */
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volatile void __iomem * va; /* virtual address */
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size_t size; /* memory size */
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};
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struct vmm_entry_param
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{
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struct vmm_iomap *iomap;
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struct vmm_domain *domain;
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};
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typedef void (*vmm_entry_t)(struct vmm_entry_param* param);
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struct rt_vmm_share_layout
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{
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struct vmm_context ctx;
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};
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#ifndef __KERNEL__
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/* not in Linux, use better type check */
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extern struct rt_vmm_share_layout rt_vmm_share;
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#define RT_VMM_SHARE (&rt_vmm_share)
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#else
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#define RT_VMM_SHARE ((struct rt_vmm_share_layout*)VMM_SHARE_CTX_POS)
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#endif
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#endif
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#endif /* end of include guard: __RTT_API_H__ */
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