2 * This file is part of the coreboot project.
4 * Copyright (C) 2008-2009 coresystems GmbH
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; version 2 of
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
23 #include <arch/romcc_io.h>
24 #include <console/console.h>
25 #include <cpu/x86/cache.h>
26 #include <cpu/x86/smm.h>
33 #define D_OPEN (1 << 6)
34 #define D_CLS (1 << 5)
35 #define D_LCK (1 << 4)
36 #define G_SMRANE (1 << 3)
37 #define C_BASE_SEG ((0 << 2) | (1 << 1) | (0 << 0))
48 #define PM2_CNT 0x20 // mobile only
52 #define EL_SMI_EN (1 << 25) // Intel Quick Resume Technology
53 #define INTEL_USB2_EN (1 << 18) // Intel-Specific USB2 SMI logic
54 #define LEGACY_USB2_EN (1 << 17) // Legacy USB2 SMI logic
55 #define PERIODIC_EN (1 << 14) // SMI on PERIODIC_STS in SMI_STS
56 #define TCO_EN (1 << 13) // Enable TCO Logic (BIOSWE et al)
57 #define MCSMI_EN (1 << 11) // Trap microcontroller range access
58 #define BIOS_RLS (1 << 7) // asserts SCI on bit set
59 #define SWSMI_TMR_EN (1 << 6) // start software smi timer on bit set
60 #define APMC_EN (1 << 5) // Writes to APM_CNT cause SMI#
61 #define SLP_SMI_EN (1 << 4) // Write to SLP_EN in PM1_CNT asserts SMI#
62 #define LEGACY_USB_EN (1 << 3) // Legacy USB circuit SMI logic
63 #define BIOS_EN (1 << 2) // Assert SMI# on setting GBL_RLS bit
64 #define EOS (1 << 1) // End of SMI (deassert SMI#)
65 #define GBL_SMI_EN (1 << 0) // SMI# generation at all?
67 #define ALT_GP_SMI_EN 0x38
68 #define ALT_GP_SMI_STS 0x3a
70 #define DEVACT_STS 0x44
74 //#include "i82801gx_nvs.h"
76 /* While we read PMBASE dynamically in case it changed, let's
77 * initialize it with a sane value
79 static u16 pmbase = DEFAULT_PMBASE;
81 // disabled because SMM doesn't actually work yet
84 * @brief read and clear PM1_STS
85 * @return PM1_STS register
87 static u16 reset_pm1_status(void)
91 reg16 = inw(pmbase + PM1_STS);
92 /* set status bits are cleared by writing 1 to them */
93 outw(reg16, pmbase + PM1_STS);
98 static void dump_pm1_status(u16 pm1_sts)
100 printk(BIOS_DEBUG, "PM1_STS: ");
101 if (pm1_sts & (1 << 15)) printk(BIOS_DEBUG, "WAK ");
102 if (pm1_sts & (1 << 14)) printk(BIOS_DEBUG, "PCIEXPWAK ");
103 if (pm1_sts & (1 << 11)) printk(BIOS_DEBUG, "PRBTNOR ");
104 if (pm1_sts & (1 << 10)) printk(BIOS_DEBUG, "RTC ");
105 if (pm1_sts & (1 << 8)) printk(BIOS_DEBUG, "PWRBTN ");
106 if (pm1_sts & (1 << 5)) printk(BIOS_DEBUG, "GBL ");
107 if (pm1_sts & (1 << 4)) printk(BIOS_DEBUG, "BM ");
108 if (pm1_sts & (1 << 0)) printk(BIOS_DEBUG, "TMROF ");
109 printk(BIOS_DEBUG, "\n");
113 * @brief read and clear SMI_STS
114 * @return SMI_STS register
116 static u32 reset_smi_status(void)
120 reg32 = inl(pmbase + SMI_STS);
121 /* set status bits are cleared by writing 1 to them */
122 outl(reg32, pmbase + SMI_STS);
127 static void dump_smi_status(u32 smi_sts)
129 printk(BIOS_DEBUG, "SMI_STS: ");
130 if (smi_sts & (1 << 26)) printk(BIOS_DEBUG, "SPI ");
131 if (smi_sts & (1 << 25)) printk(BIOS_DEBUG, "EL_SMI ");
132 if (smi_sts & (1 << 21)) printk(BIOS_DEBUG, "MONITOR ");
133 if (smi_sts & (1 << 20)) printk(BIOS_DEBUG, "PCI_EXP_SMI ");
134 if (smi_sts & (1 << 18)) printk(BIOS_DEBUG, "INTEL_USB2 ");
135 if (smi_sts & (1 << 17)) printk(BIOS_DEBUG, "LEGACY_USB2 ");
136 if (smi_sts & (1 << 16)) printk(BIOS_DEBUG, "SMBUS_SMI ");
137 if (smi_sts & (1 << 15)) printk(BIOS_DEBUG, "SERIRQ_SMI ");
138 if (smi_sts & (1 << 14)) printk(BIOS_DEBUG, "PERIODIC ");
139 if (smi_sts & (1 << 13)) printk(BIOS_DEBUG, "TCO ");
140 if (smi_sts & (1 << 12)) printk(BIOS_DEBUG, "DEVMON ");
141 if (smi_sts & (1 << 11)) printk(BIOS_DEBUG, "MCSMI ");
142 if (smi_sts & (1 << 10)) printk(BIOS_DEBUG, "GPI ");
143 if (smi_sts & (1 << 9)) printk(BIOS_DEBUG, "GPE0 ");
144 if (smi_sts & (1 << 8)) printk(BIOS_DEBUG, "PM1 ");
145 if (smi_sts & (1 << 6)) printk(BIOS_DEBUG, "SWSMI_TMR ");
146 if (smi_sts & (1 << 5)) printk(BIOS_DEBUG, "APM ");
147 if (smi_sts & (1 << 4)) printk(BIOS_DEBUG, "SLP_SMI ");
148 if (smi_sts & (1 << 3)) printk(BIOS_DEBUG, "LEGACY_USB ");
149 if (smi_sts & (1 << 2)) printk(BIOS_DEBUG, "BIOS ");
150 printk(BIOS_DEBUG, "\n");
155 * @brief read and clear GPE0_STS
156 * @return GPE0_STS register
158 static u32 reset_gpe0_status(void)
162 reg32 = inl(pmbase + GPE0_STS);
163 /* set status bits are cleared by writing 1 to them */
164 outl(reg32, pmbase + GPE0_STS);
169 static void dump_gpe0_status(u32 gpe0_sts)
172 printk(BIOS_DEBUG, "GPE0_STS: ");
173 for (i=31; i<= 16; i--) {
174 if (gpe0_sts & (1 << i)) printk(BIOS_DEBUG, "GPIO%d ", (i-16));
176 if (gpe0_sts & (1 << 14)) printk(BIOS_DEBUG, "USB4 ");
177 if (gpe0_sts & (1 << 13)) printk(BIOS_DEBUG, "PME_B0 ");
178 if (gpe0_sts & (1 << 12)) printk(BIOS_DEBUG, "USB3 ");
179 if (gpe0_sts & (1 << 11)) printk(BIOS_DEBUG, "PME ");
180 if (gpe0_sts & (1 << 10)) printk(BIOS_DEBUG, "EL_SCI/BATLOW ");
181 if (gpe0_sts & (1 << 9)) printk(BIOS_DEBUG, "PCI_EXP ");
182 if (gpe0_sts & (1 << 8)) printk(BIOS_DEBUG, "RI ");
183 if (gpe0_sts & (1 << 7)) printk(BIOS_DEBUG, "SMB_WAK ");
184 if (gpe0_sts & (1 << 6)) printk(BIOS_DEBUG, "TCO_SCI ");
185 if (gpe0_sts & (1 << 5)) printk(BIOS_DEBUG, "AC97 ");
186 if (gpe0_sts & (1 << 4)) printk(BIOS_DEBUG, "USB2 ");
187 if (gpe0_sts & (1 << 3)) printk(BIOS_DEBUG, "USB1 ");
188 if (gpe0_sts & (1 << 2)) printk(BIOS_DEBUG, "HOT_PLUG ");
189 if (gpe0_sts & (1 << 0)) printk(BIOS_DEBUG, "THRM ");
190 printk(BIOS_DEBUG, "\n");
195 * @brief read and clear TCOx_STS
196 * @return TCOx_STS registers
198 static u32 reset_tco_status(void)
200 u32 tcobase = pmbase + 0x60;
203 reg32 = inl(tcobase + 0x04);
204 /* set status bits are cleared by writing 1 to them */
205 outl(reg32 & ~(1<<18), tcobase + 0x04); // Don't clear BOOT_STS before SECOND_TO_STS
206 if (reg32 & (1 << 18))
207 outl(reg32 & (1<<18), tcobase + 0x04); // clear BOOT_STS
213 static void dump_tco_status(u32 tco_sts)
215 printk(BIOS_DEBUG, "TCO_STS: ");
216 if (tco_sts & (1 << 20)) printk(BIOS_DEBUG, "SMLINK_SLV ");
217 if (tco_sts & (1 << 18)) printk(BIOS_DEBUG, "BOOT ");
218 if (tco_sts & (1 << 17)) printk(BIOS_DEBUG, "SECOND_TO ");
219 if (tco_sts & (1 << 16)) printk(BIOS_DEBUG, "INTRD_DET ");
220 if (tco_sts & (1 << 12)) printk(BIOS_DEBUG, "DMISERR ");
221 if (tco_sts & (1 << 10)) printk(BIOS_DEBUG, "DMISMI ");
222 if (tco_sts & (1 << 9)) printk(BIOS_DEBUG, "DMISCI ");
223 if (tco_sts & (1 << 8)) printk(BIOS_DEBUG, "BIOSWR ");
224 if (tco_sts & (1 << 7)) printk(BIOS_DEBUG, "NEWCENTURY ");
225 if (tco_sts & (1 << 3)) printk(BIOS_DEBUG, "TIMEOUT ");
226 if (tco_sts & (1 << 2)) printk(BIOS_DEBUG, "TCO_INT ");
227 if (tco_sts & (1 << 1)) printk(BIOS_DEBUG, "SW_TCO ");
228 if (tco_sts & (1 << 0)) printk(BIOS_DEBUG, "NMI2SMI ");
229 printk(BIOS_DEBUG, "\n");
234 /* We are using PCIe accesses for now
235 * 1. the chipset can do it
236 * 2. we don't need to worry about how we leave 0xcf8/0xcfc behind
238 //#include "../../../northbridge/intel/i945/pcie_config.c"
240 int southbridge_io_trap_handler(int smif)
242 //global_nvs_t *gnvs = (global_nvs_t *)0xc00;
246 printk(BIOS_DEBUG, "OS Init\n");
254 /* On success, the IO Trap Handler returns 0
255 * On failure, the IO Trap Handler returns a value != 0
257 * For now, we force the return value to 0 and log all traps to
258 * see what's going on.
261 return 1; /* IO trap handled */
265 * @brief Set the EOS bit
267 void southbridge_smi_set_eos(void)
271 reg8 = inb(pmbase + SMI_EN);
273 outb(reg8, pmbase + SMI_EN);
277 * @brief Interrupt handler for SMI#
279 * @param smm_revision revision of the smm state save map
282 void southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save)
284 // FIXME: the necessary magic isn't available yet. the code
285 // below is a partially adapted ICH7 version of the handler
290 u32 smi_sts, gpe0_sts, tco_sts;
292 pmbase = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0x48) & 0xfffc;
293 printk(BIOS_SPEW, "SMI#: pmbase = 0x%04x\n", pmbase);
295 /* We need to clear the SMI status registers, or we won't see what's
296 * happening in the following calls.
298 smi_sts = reset_smi_status();
299 dump_smi_status(smi_sts);
301 if (smi_sts & (1 << 21)) { // MONITOR
302 global_nvs_t *gnvs = (global_nvs_t *)0xc00;
305 reg32 = RCBA32(0x1e00); TRSR - Trap Status Register
307 /* Comment in for some useful debug */
308 for (i=0; i<4; i++) {
309 if (reg32 & (1 << i)) {
310 printk(BIOS_DEBUG, " io trap #%d\n", i);
314 RCBA32(0x1e00) = reg32; TRSR
316 reg32 = RCBA32(0x1e10);
318 if ((reg32 & 0xfffc) != 0x808) {
319 printk(BIOS_DEBUG, " trapped io address = 0x%x\n", reg32 & 0xfffc);
320 printk(BIOS_DEBUG, " AHBE = %x\n", (reg32 >> 16) & 0xf);
321 printk(BIOS_DEBUG, " read/write: %s\n", (reg32 & (1 << 24)) ? "read" :
325 if (!(reg32 & (1 << 24))) {
327 reg32 = RCBA32(0x1e18);
328 printk(BIOS_DEBUG, " iotrap written data = 0x%08x\n", reg32);
333 io_trap_handler(gnvs->smif); // call function smif
336 if (smi_sts & (1 << 13)) { // TCO
337 tco_sts = reset_tco_status();
338 dump_tco_status(tco_sts);
340 if (tco_sts & (1 << 8)) { // BIOSWR
342 bios_cntl = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0xdc);
344 /* BWE is RW, so the SMI was caused by a
345 * write to BWE, not by a write to the BIOS
348 /* This is the place where we notice someone
349 * is trying to tinker with the BIOS. We are
350 * trying to be nice and just ignore it. A more
351 * resolute answer would be to power down the
354 printk(BIOS_DEBUG, "Switching back to RO\n");
355 pcie_write_config32(PCI_DEV(0, 0x1f, 0), 0xdc, (bios_cntl & ~1));
356 } /* No else for now? */
360 if (smi_sts & (1 << 8)) { // PM1
361 pm1_sts = reset_pm1_status();
362 dump_pm1_status(pm1_sts);
365 if (smi_sts & (1 << 9)) { // GPE0
366 gpe0_sts = reset_gpe0_status();
367 dump_gpe0_status(gpe0_sts);
370 if (smi_sts & (1 << 5)) { // APM
371 /* Emulate B2 register as the FADT / Linux expects it */
376 pmctrl = inw(pmbase + 0x04);
378 outw(pmctrl, pmbase + 0x04);
379 printk(BIOS_DEBUG, "SMI#: ACPI disabled.\n");
382 pmctrl = inw(pmbase + 0x04);
384 outw(pmctrl, pmbase + 0x04);
385 printk(BIOS_DEBUG, "SMI#: ACPI enabled.\n");
390 if (smi_sts & (1 << 4)) { // SLP_SMI
393 /* First, disable further SMIs */
394 reg8 = inb(pmbase + SMI_EN);
396 outb(reg8, pmbase + SMI_EN);
398 /* Next, do the deed, we should change
399 * power on after power loss bits here
400 * if we're going to S5
403 /* Write back to the SLP register to cause the
404 * originally intended event again. We need to set BIT13
405 * (SLP_EN) though to make the sleep happen.
407 reg32 = inl(pmbase + 0x04);
408 printk(BIOS_DEBUG, "SMI#: SLP = 0x%08x\n", reg32);
409 printk(BIOS_DEBUG, "SMI#: Powering off.\n");
410 outl(reg32 | (1 << 13), pmbase + 0x04);