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#ifndef __PV_H
#define __PV_H
#include "config.h" // CONFIG_*
#include "biosvar.h" // GET_GLOBAL
// Types of paravirtualized platforms.
#define PF_QEMU (1<<0)
#define PF_XEN (1<<1)
#define PF_KVM (1<<2)
typedef struct QemuCfgDmaAccess {
u32 control;
u32 length;
u64 address;
} PACKED QemuCfgDmaAccess;
extern u32 RamSize;
extern u64 RamSizeOver4G;
extern int PlatformRunningOn;
static inline int runningOnQEMU(void) {
return CONFIG_QEMU || (
CONFIG_QEMU_HARDWARE && GET_GLOBAL(PlatformRunningOn) & PF_QEMU);
}
static inline int runningOnXen(void) {
return CONFIG_XEN && GET_GLOBAL(PlatformRunningOn) & PF_XEN;
}
static inline int runningOnKVM(void) {
return CONFIG_QEMU && GET_GLOBAL(PlatformRunningOn) & PF_KVM;
}
// Common paravirt ports.
#define PORT_SMI_CMD 0x00b2
#define PORT_SMI_STATUS 0x00b3
#define PORT_QEMU_CFG_CTL 0x0510
#define PORT_QEMU_CFG_DATA 0x0511
#define PORT_QEMU_CFG_DMA_ADDR_HIGH 0x0514
#define PORT_QEMU_CFG_DMA_ADDR_LOW 0x0518
// QEMU_CFG_DMA_CONTROL bits
#define QEMU_CFG_DMA_CTL_ERROR 0x01
#define QEMU_CFG_DMA_CTL_READ 0x02
#define QEMU_CFG_DMA_CTL_SKIP 0x04
#define QEMU_CFG_DMA_CTL_SELECT 0x08
// QEMU_CFG_DMA ID bit
#define QEMU_CFG_VERSION_DMA 2
int qemu_cfg_dma_enabled(void);
void qemu_preinit(void);
void qemu_platform_setup(void);
void qemu_cfg_init(void);
#endif
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