x86/boot/memory.c

21 	struct biosregs ireg, oreg;
46 		intcall(0x15, &ireg, &oreg);
47 		ireg.ebx = oreg.ebx; /* for next iteration... */
52 		if (oreg.eflags & X86_EFLAGS_CF)
60 		if (oreg.eax != SMAP) {
74 	struct biosregs ireg, oreg;
78 	intcall(0x15, &ireg, &oreg);
80 	if (oreg.eflags & X86_EFLAGS_CF)
84 	if (oreg.cx || oreg.dx) {
85 		oreg.ax = oreg.cx;
86 		oreg.bx = oreg.dx;
89 	if (oreg.ax > 15*1024) {
91 	} else if (oreg.ax == 15*1024) {
92 		boot_params.alt_mem_k = (oreg.bx << 6) + oreg.ax;
101 		boot_params.alt_mem_k = oreg.ax;
107 	struct biosregs ireg, oreg;
111 	intcall(0x15, &ireg, &oreg);
113 	boot_params.screen_info.ext_mem_k = oreg.ax;